number = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'] Alphabet = [' ', ' ', 'abc', 'def', 'ghi', 'jkl', 'mno', 'pqrs', 'tuv', 'wxyz'] def alphabet_to_digital(inputstr): result = [] for i in range(len(inputstr)): for j in range(len(Alphabet)): if inputstr[i] in Alp...