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: ['F', 'N', 'Y', '905', '3299', '3763', '885', '1795', 'T', '8221', 'p', 'K', 'O', 'X', '557', 'S', 'K', '2807', '1061', '9875', '3133', '4349', '8485', '9225', '609', 'Y']

6, 14, 25, 905, 3299, 3763, 885, 1795, 20, 8221, 16, 11, 15, 24, 557, 19, 11, 2807, 1061, 9875, 3133, 4349, 8485, 9225, 609, 25