def freqAlphabets(s: str) -> str:
    # Define a dictionary to map digits to their corresponding ASCII characters
    ascii_dict = {
        '1': 'a',
        '2': 'b',
        '3': 'c',
        '4': 'd',
        '5': 'e',
        '6': 'f',
        '7': 'g',
        '8': 'h',
        '9': 'i',
        '10#': 'j',
        '11#': 'k',
        '12#': 'l',
        '13': 'm',
        '14': 'n',
        '15': 'o',
        '16': 'p',
        '17': 'q',
        '18': 'r',
        '19': 's',
        '20': 't',
        '21': 'u',
        '22': 'v',
        '23': 'w',
        '24': 'x',
        '25': 'y',
        '26': 'z'
    }

    # Split the input string into separate digits
    digits = []
    i = 0
    while i < len(s):
        if i+2 < len(s) and s[i+2] == '#':
            digits.append(s[i:i+3])
            i += 3
        else:
            digits.append(s[i])
            i += 1

    # Convert each digit to its corresponding ASCII character using the dictionary
    result = ''
    for digit in digits:
        if digit in ascii_dict:
            result += ascii_dict[digit]
        else:
            result += ascii_dict[digit[0]]
            if digit[1] != '0':
                result += ascii_dict[digit[1]]

    return result

def main():
    print(freqAlphabets("22#10#21"))

if __name__ == "__main__":
    main()