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: ['953', '5731', '7483', '5749', 'm', 'T', '6625', 'f', '6011', 'z', 'L', '5597', 'v', 'U', 'X', 'O', 'N']

953, 5731, 7483, 5749, 13, 20, 6625, 6, 6011, 26, 12, 5597, 22, 21, 24, 15, 14