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: ['7263', '5287', '6205', '9579', 'n', '2647', 'm', '6547', '1033', 'N', '6145', 'y', '3863', 'G', '1383', '5921', '8269', '4519', '7327', '1131', 'G', 'f', 'r', '8771', 'e', '8915', '6355', 'c', '1923', '6521', 'i', 'O', '2249', '8807']

7263, 5287, 6205, 9579, 14, 2647, 13, 6547, 1033, 14, 6145, 25, 3863, 7, 1383, 5921, 8269, 4519, 7327, 1131, 7, 6, 18, 8771, 5, 8915, 6355, 3, 1923, 6521, 9, 15, 2249, 8807