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: ['1037', 'U', '4009', '5831', '4309', '7979', 'k', '8085', 'e', '1655', 'm', '7157', 'A', 'j', '9511', 'a', 'B', 'c']

1037, 21, 4009, 5831, 4309, 7979, 11, 8085, 5, 1655, 13, 7157, 1, 10, 9511, 1, 2, 3