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: ['H', '9343', 'i', '7221', '4421', 'o', '6499', '5629', '8383', '4089', '6955', 'r', '9307', 't', '1337', '3739', '569', 'x', 'u', 'a', 'a', '9167']

8, 9343, 9, 7221, 4421, 15, 6499, 5629, 8383, 4089, 6955, 18, 9307, 20, 1337, 3739, 569, 24, 21, 1, 1, 9167