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: ['t', '8525', 'W', 's', 'q', '263', '4781', '8933', 'V', 'c', 'Q', '7603', '2703', 'n', '1865', '9691', 'T', '2645', 'G', 'z', 'T', '6467', '7861', 'U']

20, 8525, 23, 19, 17, 263, 4781, 8933, 22, 3, 17, 7603, 2703, 14, 1865, 9691, 20, 2645, 7, 26, 20, 6467, 7861, 21