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: ['I', 'P', 'n', '5483', '777', '5057', 'q', 'c', 'u', 'F', 'f', '3375', 'n', 'q', 'o', 'u', 'n', '2351', '9355', '1535', '7223', '6289', '6747', '8195', 'd', '6793', 'J', '5321', 'Z', 'G', 'L', '923', 'R', 'Z']

9, 16, 14, 5483, 777, 5057, 17, 3, 21, 6, 6, 3375, 14, 17, 15, 21, 14, 2351, 9355, 1535, 7223, 6289, 6747, 8195, 4, 6793, 10, 5321, 26, 7, 12, 923, 18, 26