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: ['6687', 'A', '5955', 'M', '6469', '8655', '627', '5299', '3065', 'o', 'x', 'A', 'y', '9285', 'h', '3729', 'O', '8519', 'q', '5695', 'm', 'q', 'J', '4161', '5557', '9327', '1263', 'E', '8719', '7429', '8595', '1133', 'p', '8365', '893', 'B', 'f', 'A', 'n', '8151']

6687, 1, 5955, 13, 6469, 8655, 627, 5299, 3065, 15, 24, 1, 25, 9285, 8, 3729, 15, 8519, 17, 5695, 13, 17, 10, 4161, 5557, 9327, 1263, 5, 8719, 7429, 8595, 1133, 16, 8365, 893, 2, 6, 1, 14, 8151