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: ['7703', 'G', '7017', 'k', '1973', '9607', '9327', '295', 'w', '6975', '5331', '7237', 'P', '5521', 'N', '151', '9149', '4285', '8299', 'M', 'Y', 'l', 'v', 'R', 'c', 'Z', 'y', '9887', 'r']

7703, 7, 7017, 11, 1973, 9607, 9327, 295, 23, 6975, 5331, 7237, 16, 5521, 14, 151, 9149, 4285, 8299, 13, 25, 12, 22, 18, 3, 26, 25, 9887, 18