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', 'w', 'y', '8231', 't', '5601', 'G', 'o', 'r', 'y', '3521', '4115', '7767', '7749', 'H', '9977', 'V', 'X', '3859', 'N', '1277', 'y', 'U', 'u', '755']

21, 23, 25, 8231, 20, 5601, 7, 15, 18, 25, 3521, 4115, 7767, 7749, 8, 9977, 22, 24, 3859, 14, 1277, 25, 21, 21, 755