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: ['1801', '667', 'e', 'U', 't', '6309', '5535', 'g', '3007', 'g', 'y', '7329', '3741', 'f', 'O', 'i', 'T', 'p', '685', 'u', 'q', '8561', 'Z']

1801, 667, 5, 21, 20, 6309, 5535, 7, 3007, 7, 25, 7329, 3741, 6, 15, 9, 20, 16, 685, 21, 17, 8561, 26