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: ['c', 'M', 's', 's', '2409', 'c', '445', '6889', '2853', '2595', '1085', 'v', 'l', 'P', '6919', '7769', '1079', 'e', 'L', '2725', 'u', 'V', '9633', 'Z', '7617', '3543', 'o', 'Z', 'b', 'Y']

3, 13, 19, 19, 2409, 3, 445, 6889, 2853, 2595, 1085, 22, 12, 16, 6919, 7769, 1079, 5, 12, 2725, 21, 22, 9633, 26, 7617, 3543, 15, 26, 2, 25