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: ['9945', '1929', 'z', '2701', '9761', 'B', 'y', '8875', '2497', 'X', 'm', 'A', 'n', 'z', '8819', 'f', '6071', 'J', '8265', '9119', '1693', 'W', 'H', '8551', 'C', '8667', '1255', '2931', 'B', '433', '4821', '7739', '2097', '4465', 'O']

9945, 1929, 26, 2701, 9761, 2, 25, 8875, 2497, 24, 13, 1, 14, 26, 8819, 6, 6071, 10, 8265, 9119, 1693, 23, 8, 8551, 3, 8667, 1255, 2931, 2, 433, 4821, 7739, 2097, 4465, 15