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: ['L', '5945', '8419', '3755', '8673', 'M', 'X', 'l', '1063', 'k', 'L', 'S', 'v', 'H', 'P', 'X', 'j', 'h', 'B', 'B', '3891', '1773', 'N', 'y', 'P', 'V', '9621', 'm']

12, 5945, 8419, 3755, 8673, 13, 24, 12, 1063, 11, 12, 19, 22, 8, 16, 24, 10, 8, 2, 2, 3891, 1773, 14, 25, 16, 22, 9621, 13