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: ['7357', '6085', '6729', 'B', '2117', 'I', '2805', 'b', 'h', '947', '4051', '9515', 'Z', 'h', 'h', '7037', '6739', '891', '3197', '7993', 'L']

7357, 6085, 6729, 2, 2117, 9, 2805, 2, 8, 947, 4051, 9515, 26, 8, 8, 7037, 6739, 891, 3197, 7993, 12