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: ['4161', '7373', 'i', 't', '1729', '2407', 'S', 'v', '3457', '3913', 'j', '6827', '1205', '3291', '8215']

4161, 7373, 9, 20, 1729, 2407, 19, 22, 3457, 3913, 10, 6827, 1205, 3291, 8215