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: ['2867', '511', '565', 'W', 'q', '429', 'G', '3069', 'Y', 'E', '3609', 'r', '4309', '857', 'd', '7417', 'A', 'E', 'Y', '8091', 'b', '7463', '3941', '6391', '7565', '1835', 'B', '2945']

2867, 511, 565, 23, 17, 429, 7, 3069, 25, 5, 3609, 18, 4309, 857, 4, 7417, 1, 5, 25, 8091, 2, 7463, 3941, 6391, 7565, 1835, 2, 2945