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: ['1629', 'z', '941', 'E', 'U', '7005', 'Q', 'b', '1449', 'w', '2731', '245', 'b', '8379', '5119', 'B', '7571', '7583', '2133', '2415', '1667', '9657']

1629, 26, 941, 5, 21, 7005, 17, 2, 1449, 23, 2731, 245, 2, 8379, 5119, 2, 7571, 7583, 2133, 2415, 1667, 9657