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.

['t', '855', 'x', 'E', '6569', 'P', '2985', '767', '6427', '4061', '2493', 'Z', 'u', '8289', '5901', '3755', 'd', '4015', '1181']
20, 855, 24, 5, 6569, 16, 2985, 767, 6427, 4061, 2493, 26, 21, 8289, 5901, 3755, 4, 4015, 1181

['a', '8765', 'T', '815', '2407', 'j', 'C', 'g', 'M', '1377', 'L', 'm', 'L', '5553', 'Z', 'g', '7403', 'W', 'H', '7521', 'R', '3921', 'I']
1, 8765, 20, 815, 2407, 10, 3, 7, 13, 1377, 12, 13, 12, 5553, 26, 7, 7403, 23, 8, 7521, 18, 3921, 9

['751', '6157', '1501', '4993', '5801', 'Y', 'm', '8403', '9755', 'l', 'h', 'B', 'N', '369', 'o', '8101', 'g', 'D', '6685', '8843', '2991', '3927', 'h', 'I', '4667', '5857', 'h']

751, 6157, 1501, 4993, 5801, 25, 13, 8403, 9755, 12, 8, 2, 14, 369, 15, 8101, 7, 4, 6685, 8843, 2991, 3927, 8, 9, 4667, 5857, 8