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: ['R', 'X', 'm', 't', '7617', 'K', '6381', 'C', 'U', 'c', '7177', 'V', '7683', '9115', 'E', 'X', '677', '9285', '1229', '5933', '8319', '2677', 'K', 's', 't', '8085', '2681', 'f', 'f', 'T', 'u', 'N']

18, 24, 13, 20, 7617, 11, 6381, 3, 21, 3, 7177, 22, 7683, 9115, 5, 24, 677, 9285, 1229, 5933, 8319, 2677, 11, 19, 20, 8085, 2681, 6, 6, 20, 21, 14