diff --git a/_ci_tdd/test_files/test_main_miunit.c b/_ci_tdd/test_files/test_main_miunit.c
index 8b59734..b30e413 100644
--- a/_ci_tdd/test_files/test_main_miunit.c
+++ b/_ci_tdd/test_files/test_main_miunit.c
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/05/09 19:06:12 by umeneses          #+#    #+#             */
-/*   Updated: 2024/07/01 11:14:31 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 12:47:24 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -459,7 +459,7 @@ MU_TEST(test_3rd_miastep_get_cost)
 	actual_size = ft_lst_size(stack_a);
 	ft_lst_map_all_indexers(&stack_a);
 	ft_push_b_all_but_three(&stack_a, &stack_b);
-	ft_sort_three_nbrs(&stack_a);
+	ft_sort_a_with_three_nbrs(&stack_a);
 	ft_lst_get_cost(&stack_a, &stack_b);
 	actual_top_a = ft_lst_goto_head(stack_a)->nbr;
 	actual_bottom_a = ft_lst_goto_end(stack_a)->nbr;
@@ -505,7 +505,7 @@ MU_TEST(test_3rd_miastep_map_get_target_position)
 	expected_target_pos = 2; // should be stack_b->target
 	actual_size = ft_lst_size(stack_a);
 	ft_push_b_all_but_three(&stack_a, &stack_b);
-	ft_sort_three_nbrs(&stack_a);
+	ft_sort_a_with_three_nbrs(&stack_a);
 	ft_lst_get_target_position(&stack_a, &stack_b);
 
 	actual_bottom_a = ft_lst_goto_end(stack_a)->nbr;
@@ -815,7 +815,7 @@ MU_TEST(test_2nd_miastep_push_b_all_but3_sort_a)
 	actual_bottom_a_before_push = ft_lst_goto_end(stack_a)->nbr;
 
 	ft_push_b_all_but_three(&stack_a, &stack_b);
-	ft_sort_three_nbrs(&stack_a);
+	ft_sort_a_with_three_nbrs(&stack_a);
 
 	expected_top_a_after_push = ft_atoi(argv_simulation[6]);
 	expected_bottom_a_after_push = ft_atoi(argv_simulation[5]);
@@ -1021,7 +1021,7 @@ MU_TEST(test_sort_3_nbrs_already_sorted)
 	expected_sorted_bottom = ft_atoi(argv_simulation[3]);
 	stack = ft_lts_buildstack_argv(&stack, argv_simulation);
 	ft_lst_map_all_indexers(&stack);
-	stack = ft_sort_three_nbrs(&stack);
+	stack = ft_sort_a_with_three_nbrs(&stack);
 	actual_size = ft_lst_size(stack);
 	actual_sorted_top = ft_lst_goto_head(stack)->nbr;
 	actual_sorted_bottom = ft_lst_goto_end(stack)->nbr;
@@ -1056,7 +1056,7 @@ MU_TEST(test_sort_3_nbrs_highest_last)
 	expected_sorted_bottom = ft_atoi(argv_simulation[3]);
 	stack = ft_lts_buildstack_argv(&stack, argv_simulation);
 	ft_lst_map_all_indexers(&stack);
-	stack = ft_sort_three_nbrs(&stack);
+	stack = ft_sort_a_with_three_nbrs(&stack);
 	actual_size = ft_lst_size(stack);
 	actual_sorted_top = ft_lst_goto_head(stack)->nbr;
 	actual_sorted_bottom = ft_lst_goto_end(stack)->nbr;
@@ -1091,7 +1091,7 @@ MU_TEST(test_sort_3_nbrs_highest_first_v2)
 	expected_sorted_bottom = ft_atoi(argv_simulation[1]);
 	stack = ft_lts_buildstack_argv(&stack, argv_simulation);
 	ft_lst_map_all_indexers(&stack);
-	stack = ft_sort_three_nbrs(&stack);
+	stack = ft_sort_a_with_three_nbrs(&stack);
 	actual_size = ft_lst_size(stack);
 	actual_sorted_top = ft_lst_goto_head(stack)->nbr;
 	actual_sorted_bottom = ft_lst_goto_end(stack)->nbr;
@@ -1126,7 +1126,7 @@ MU_TEST(test_sort_3_nbrs_highest_first)
 	expected_sorted_bottom = ft_atoi(argv_simulation[1]);
 	stack = ft_lts_buildstack_argv(&stack, argv_simulation);
 	ft_lst_map_all_indexers(&stack);
-	stack = ft_sort_three_nbrs(&stack);
+	stack = ft_sort_a_with_three_nbrs(&stack);
 	actual_size = ft_lst_size(stack);
 	actual_sorted_top = ft_lst_goto_head(stack)->nbr;
 	actual_sorted_bottom = ft_lst_goto_end(stack)->nbr;
@@ -1161,7 +1161,7 @@ MU_TEST(test_sort_3_nbrs_highest_at_middle_v2)
 	expected_sorted_bottom = ft_atoi(argv_simulation[2]);
 	stack = ft_lts_buildstack_argv(&stack, argv_simulation);
 	ft_lst_map_all_indexers(&stack);
-	stack = ft_sort_three_nbrs(&stack);
+	stack = ft_sort_a_with_three_nbrs(&stack);
 	actual_size = ft_lst_size(stack);
 	actual_sorted_bottom = ft_lst_goto_end(stack)->nbr;
 	stack = ft_lst_goto_head(stack);
@@ -1197,7 +1197,7 @@ MU_TEST(test_sort_3_nbrs_highest_at_middle)
 	expected_sorted_bottom = ft_atoi(argv_simulation[2]);
 	stack = ft_lts_buildstack_argv(&stack, argv_simulation);
 	ft_lst_map_all_indexers(&stack);
-	stack = ft_sort_three_nbrs(&stack);
+	stack = ft_sort_a_with_three_nbrs(&stack);
 	actual_size = ft_lst_size(stack);
 	actual_sorted_top = ft_lst_goto_head(stack)->nbr;
 	actual_sorted_bottom = ft_lst_goto_end(stack)->nbr;
diff --git a/program_to_test/headers/push_swap.h b/program_to_test/headers/push_swap.h
index dbdaea2..38c70a6 100644
--- a/program_to_test/headers/push_swap.h
+++ b/program_to_test/headers/push_swap.h
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/05/08 15:23:33 by umeneses          #+#    #+#             */
-/*   Updated: 2024/06/28 17:20:40 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 12:46:32 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -69,7 +69,7 @@ bool		ft_is_sorted(t_stack *stack);
 int			ft_lst_map_highest_pos(t_stack *list);
 void		ft_do_sort(t_stack **stack_a, t_stack **stack_b);
 t_stack		*ft_sort_two_nbrs(t_stack **stack);
-t_stack		*ft_sort_three_nbrs(t_stack **stack);
+t_stack		*ft_sort_a_with_three_nbrs(t_stack **stack_a);
 /* sorting functions if list has until 3 numbers */
 
 void		ft_sort_four_nbrs(t_stack **stack_a, t_stack **stack_b);
diff --git a/program_to_test/src/ft_argv_validation.c b/program_to_test/src/ft_argv_validation.c
index 07d9918..bee417d 100644
--- a/program_to_test/src/ft_argv_validation.c
+++ b/program_to_test/src/ft_argv_validation.c
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/03 11:43:20 by umeneses          #+#    #+#             */
-/*   Updated: 2024/07/01 11:11:25 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 12:36:11 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -26,8 +26,11 @@ bool	ft_argv_valid_sign_and_not_alpha(char **argv)
 			if (ft_isalpha(*(argv[index] + c_counter)))
 				return (false);
 			if (ft_is_sign(*(argv[index] + c_counter)))
-				if (ft_is_sign(*(argv[index] + c_counter + 1)))
+			{
+				if (ft_is_sign(*(argv[index] + c_counter + 1))
+					|| (*(argv[index] + c_counter + 1) == '\0'))
 					return (false);
+			}
 			c_counter++;
 		}
 	}
diff --git a/program_to_test/src/ft_do_sort.c b/program_to_test/src/ft_do_sort.c
index a6b0e79..5d40351 100644
--- a/program_to_test/src/ft_do_sort.c
+++ b/program_to_test/src/ft_do_sort.c
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/06 18:46:55 by umeneses          #+#    #+#             */
-/*   Updated: 2024/06/26 14:01:57 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 11:58:52 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -22,7 +22,7 @@ void	ft_do_sort(t_stack **stack_a, t_stack **stack_b)
 		if (stack_size == 2)
 			ft_sort_two_nbrs(stack_a);
 		else if (stack_size == 3)
-			ft_sort_three_nbrs(stack_a);
+			ft_sort_a_with_three_nbrs(stack_a);
 		else
 		{
 			ft_sort_five_or_more_nbr(stack_a, stack_b);
diff --git a/program_to_test/src/ft_sort_5_or_more.c b/program_to_test/src/ft_sort_5_or_more.c
index 5d7778a..7671525 100644
--- a/program_to_test/src/ft_sort_5_or_more.c
+++ b/program_to_test/src/ft_sort_5_or_more.c
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/10 12:41:29 by umeneses          #+#    #+#             */
-/*   Updated: 2024/06/26 14:01:00 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 12:46:58 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -15,7 +15,7 @@
 void	ft_sort_five_or_more_nbr(t_stack **stack_a, t_stack **stack_b)
 {
 	ft_push_b_all_but_three(stack_a, stack_b);
-	ft_sort_three_nbrs(stack_a);
+	ft_sort_a_with_three_nbrs(stack_a);
 	while (*stack_b)
 	{
 		ft_lst_get_target_position(stack_a, stack_b);
diff --git a/program_to_test/src/ft_sort_until3.c b/program_to_test/src/ft_sort_until3.c
index da99c2f..ad8f7c1 100644
--- a/program_to_test/src/ft_sort_until3.c
+++ b/program_to_test/src/ft_sort_until3.c
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/04 12:19:14 by umeneses          #+#    #+#             */
-/*   Updated: 2024/06/26 14:02:16 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 12:46:17 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -33,21 +33,21 @@ t_stack	*ft_sort_two_nbrs(t_stack **list)
 	return (*list);
 }
 
-t_stack	*ft_sort_three_nbrs(t_stack **list)
+t_stack	*ft_sort_a_with_three_nbrs(t_stack **stack_a)
 {
 	int	highest_pos;
 
-	*list = ft_lst_goto_head(*list);
-	if (ft_is_sorted(*list))
-		return (*list);
-	highest_pos = ft_lst_map_highest_pos(*list);
-	if ((*list)->final_pos == highest_pos)
-		ft_do_rotate_a(list);
-	else if ((*list)->next->final_pos == highest_pos)
-		ft_do_reverse_rotate_a(list);
-	if ((*list)->final_pos > (*list)->next->final_pos)
-		ft_do_swap_a(list);
-	return (*list);
+	*stack_a = ft_lst_goto_head(*stack_a);
+	if (ft_is_sorted(*stack_a))
+		return (*stack_a);
+	highest_pos = ft_lst_map_highest_pos(*stack_a);
+	if ((*stack_a)->final_pos == highest_pos)
+		ft_do_rotate_a(stack_a);
+	else if ((*stack_a)->next->final_pos == highest_pos)
+		ft_do_reverse_rotate_a(stack_a);
+	if ((*stack_a)->final_pos > (*stack_a)->next->final_pos)
+		ft_do_swap_a(stack_a);
+	return (*stack_a);
 }
 
 int	ft_lst_map_highest_pos(t_stack *list)
diff --git a/program_to_test/src/ft_sort_until4.c b/program_to_test/src/ft_sort_until4.c
index 115651c..761d898 100644
--- a/program_to_test/src/ft_sort_until4.c
+++ b/program_to_test/src/ft_sort_until4.c
@@ -6,7 +6,7 @@
 /*   By: umeneses <umeneses@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/10 12:41:29 by umeneses          #+#    #+#             */
-/*   Updated: 2024/06/26 13:47:22 by umeneses         ###   ########.fr       */
+/*   Updated: 2024/07/01 12:46:21 by umeneses         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -17,7 +17,7 @@ void	ft_sort_four_nbrs(t_stack **stack_a, t_stack **stack_b)
 	int	highest_pos_b;
 
 	ft_push_b_all_but_three(stack_a, stack_b);
-	ft_sort_three_nbrs(stack_a);
+	ft_sort_a_with_three_nbrs(stack_a);
 	highest_pos_b = ft_lst_map_highest_pos(*stack_b);
 	if ((*stack_b)->final_pos == highest_pos_b)
 	{