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: ['U', '3681', 'l', 'g', '4195', 'D', '2231', '6299', 'E', 'f', 'W', 'V', '4177', 'Z', 'f', '197', '3543', 'd', 'h', 'R', '6177', 'n', 'A', 'C', 'H', 'j', 'g', 'F', 'L', '1635', 'g', '4131', 'c', '2149', 'e', '6497', 'F', 'e', 'q']

21, 3681, 12, 7, 4195, 4, 2231, 6299, 5, 6, 23, 22, 4177, 26, 6, 197, 3543, 4, 8, 18, 6177, 14, 1, 3, 8, 10, 7, 6, 12, 1635, 7, 4131, 3, 2149, 5, 6497, 6, 5, 17