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: ['Z', '7603', '7629', 'g', 'F', '4069', 'Y', 'W', 'g', '8477', '1217', 'e', 'a', 'T', 'b', 'E', 'u', '7775', '3257', 'H', 'x', 'l']

26, 7603, 7629, 7, 6, 4069, 25, 23, 7, 8477, 1217, 5, 1, 20, 2, 5, 21, 7775, 3257, 8, 24, 12