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: ['U', '9925', '475', 'b', '2569', 'O', 'F', 'T', 'm', '6923', '2895', 'S', '9343', '3101', '7339', '317', 'o', '1463', '5323', '7859', 'q', 'Z', 'M', 'y', 'x']

21, 9925, 475, 2, 2569, 15, 6, 20, 13, 6923, 2895, 19, 9343, 3101, 7339, 317, 15, 1463, 5323, 7859, 17, 26, 13, 25, 24