HorseRPG

• Enter the size of the map and the location of the self-propelled gun at the beginning
• Fill in the numbers from the starting position
• Fill in according to the rules of chess horse walking day
• Output all the ways to fill the map
• Numbers will not be repeated to the same box

Input

• The integers n and m represent the size of the map
• The integers x and y represent the starting coordinates of the Knight

Output

• There are several possibilities to fill in numbers