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: ['2745', 'j', 'r', 'u', 'y', '4621', 'u', 'S', '7523', '3157', '8771', '7933', 'V', 'p', 'A']

2745, 10, 18, 21, 25, 4621, 21, 19, 7523, 3157, 8771, 7933, 22, 16, 1