Convert a sentence into its equivalent mobile numeric keypad sequence.py

class Solution:
    def printSequence(self, S):
        dic = {
            "a": "2",
            "b": "22",
            "c": "222",
            "d": "3",
            "e": "33",
            "f": "333",
            "g": "4",
            "h": "44",
            "i": "444",
            "j": "5",
            "k": "55",
            "l": "555",
            "m": "6",
            "n": "66",
            "o": "666",
            "p": "7",
            "q": "77",
            "r": "777",
            "s": "7777",
            "t": "8",
            "u": "88",
            "v": "888",
            "w": "9",
            "x": "99",
            "y": "999",
            "z": "9999",
            " ": "0",
        }
        out = ""
        for alphabet in S:
            out += dic[alphabet.lower()]
        return out


solObj = Solution()
print(solObj.printSequence("abcdefghijklmno pqz"))