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: ['4351', 'f', 'F', '6233', '5645', '6957', 'Z', 'h', 'y', '711', '1495', '9287', 'H', '2859', 'U', '7119', '9897', '3885', '5757', '7793', '9089', '1639', 'X', '5031', 'V', '7619', 'T', 'Z', 'H', '8061']

4351, 6, 6, 6233, 5645, 6957, 26, 8, 25, 711, 1495, 9287, 8, 2859, 21, 7119, 9897, 3885, 5757, 7793, 9089, 1639, 24, 5031, 22, 7619, 20, 26, 8, 8061