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: ['E', 't', 'l', '8125', '1891', '8095', '473', 'x', '5327', '3693', 'f', '7939', 'P', '6119', 'z', '1525', '2035', '8759', 'N', 'R', 'M', 'U', 'R', 'W', 'u', 'h', 'a', '8075', '1391', '7441', 'Q', '7235']

5, 20, 12, 8125, 1891, 8095, 473, 24, 5327, 3693, 6, 7939, 16, 6119, 26, 1525, 2035, 8759, 14, 18, 13, 21, 18, 23, 21, 8, 1, 8075, 1391, 7441, 17, 7235