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: ['7299', 'u', '1557', 'I', 'F', 'K', '5661', 'n', '3427', 'Q', 'z', '1655', 'm', 'G', '1837', 'F', 'P', 'A', '7407', '1697', 'T', 'k', '8549', '3349', '651', 'y', 'W', 'J', '2893', 'T', '1779', '4703', '173', '7249', 'R', 'M', 'p', '6915', 'q', 'h']

7299, 21, 1557, 9, 6, 11, 5661, 14, 3427, 17, 26, 1655, 13, 7, 1837, 6, 16, 1, 7407, 1697, 20, 11, 8549, 3349, 651, 25, 23, 10, 2893, 20, 1779, 4703, 173, 7249, 18, 13, 16, 6915, 17, 8