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: ['v', '2621', '7823', 'l', '431', 'T', 'C', '7587', 'p', '3323', 'U', '6299', 'o', 'l', '8787', 'C', '2405', '5407', '8391', '4319', '9755', 'H', 'Q']

22, 2621, 7823, 12, 431, 20, 3, 7587, 16, 3323, 21, 6299, 15, 12, 8787, 3, 2405, 5407, 8391, 4319, 9755, 8, 17