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: ['X', '7647', 'Z', 'M', 'X', '5749', '8931', '4309', '2151', '2677', '4339', '9307', 'F', 'd', '4565', 'K', '2881', 'b', '5921', 'R', 'a', 't', '8333', '9283', 'f', '361', '8277', '9513', '2015', 'F', 'E', '7681', '3969', '6013', '3349', 'a', 'j', 'q', 'P']

24, 7647, 26, 13, 24, 5749, 8931, 4309, 2151, 2677, 4339, 9307, 6, 4, 4565, 11, 2881, 2, 5921, 18, 1, 20, 8333, 9283, 6, 361, 8277, 9513, 2015, 6, 5, 7681, 3969, 6013, 3349, 1, 10, 17, 16