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: ['N', 'd', '4881', 'B', '901', '9607', '6685', 'P', '7209', 'O', 'N', 'q', '3711', '7505', 's', '9', 't', 'C', '5687', 'w', 'N', '343', 'w', '3807', 's', '7065', '8637', 'Z', '3059', '1949', 'u', 'E', '1521', 'B', 'N', 'd', 'n']

14, 4, 4881, 2, 901, 9607, 6685, 16, 7209, 15, 14, 17, 3711, 7505, 19, 9, 20, 3, 5687, 23, 14, 343, 23, 3807, 19, 7065, 8637, 26, 3059, 1949, 21, 5, 1521, 2, 14, 4, 14