Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['z', 'i', '6523', '1743', 'f', 'U', '5079', 'P', '8523', 'A', '6451', '9371', 'L', '1919', '4345', '7993', 'v', '6817', 'D', 'K', 'Z', 'i', 'g', '3361', '8537', 'A', '6319', '9271']

26, 9, 6523, 1743, 6, 21, 5079, 16, 8523, 1, 6451, 9371, 12, 1919, 4345, 7993, 22, 6817, 4, 11, 26, 9, 7, 3361, 8537, 1, 6319, 9271