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: ['3351', 'y', 'C', 'n', 'g', '1897', 'Q', 'K', 'k', '9585', 'G', '43', '1113', 'Y', 'd', 'o', 'J', '7495', '787', 'x', '4895', '6431', 'T', 'W', 'l', '521', 'E', 'V', 'e', '1887', 'B', 'B', '5275', 'K', 'f', 'b', '123']

3351, 25, 3, 14, 7, 1897, 17, 11, 11, 9585, 7, 43, 1113, 25, 4, 15, 10, 7495, 787, 24, 4895, 6431, 20, 23, 12, 521, 5, 22, 5, 1887, 2, 2, 5275, 11, 6, 2, 123