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: ['O', 'X', 'o', '5059', 'W', 'm', '2085', '6357', '3555', '2183', '7045', '2389', '6627', 'M', 'Z', 'S', 'J', 'u', '1367']

15, 24, 15, 5059, 23, 13, 2085, 6357, 3555, 2183, 7045, 2389, 6627, 13, 26, 19, 10, 21, 1367