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: ['q', 'z', '6837', '1137', '1525', '5617', 'y', 'L', '3463', 'b', 'h', '1621', 'n', 'o', '545', 'm', 'z', 'Q', '9315', 'N', '5129', 'X', '5741', '2655', '3245', '8033', '1493', 'u', 'N', 'n', 'B', 'R', '4091', '4593', '9053', 'V', 'G', 'L']

17, 26, 6837, 1137, 1525, 5617, 25, 12, 3463, 2, 8, 1621, 14, 15, 545, 13, 26, 17, 9315, 14, 5129, 24, 5741, 2655, 3245, 8033, 1493, 21, 14, 14, 2, 18, 4091, 4593, 9053, 22, 7, 12