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: ['9153', '8601', '5309', '5791', '5879', '1701', '2581', 'G', 'E', 'y', '5531', '4981', 'C', '3239', '711', 'a', 'v', 'l', 'w', '4727', '8657', 'Y', '6187', 'd', '1749', '959', '2473', '4675', '8457', '8275', '4651', 'X', '7545', '4393', 'B']

9153, 8601, 5309, 5791, 5879, 1701, 2581, 7, 5, 25, 5531, 4981, 3, 3239, 711, 1, 22, 12, 23, 4727, 8657, 25, 6187, 4, 1749, 959, 2473, 4675, 8457, 8275, 4651, 24, 7545, 4393, 2