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.

['U', 'C', '7173', 'r', 'Z', 'e', '4057', '5191', 'k', '73', '9335', '6143', '8871', '6023', '5765', 'O', '5379', '5269', '9935', 'K', 'V', '7561', 'j', 'R', 'o', '9207', 'F', '7169', '9941', 'm', 'J', '4203', 'k', 'B', 'G']
21, 3, 7173, 18, 26, 5, 4057, 5191, 11, 73, 9335, 6143, 8871, 6023, 5765, 15, 5379, 5269, 9935, 11, 22, 7561, 10, 18, 15, 9207, 6, 7169, 9941, 13, 10, 4203, 11, 2, 7

['u', 'a', '9939', '9353', 'v', 'S', 'l', '981', 'P', 'q', 'M', 'w', '8419']
21, 1, 9939, 9353, 22, 19, 12, 981, 16, 17, 13, 23, 8419

['W', 'p', '8807', 'u', 'U', '8319', 'e', 'd', 'g', 'X', '331', 'C', 'm', '9233', '2669', '2177', 'U', '9639', 'V', '5197', '2441', '8149', '783', '8049', 'i', '573', '4921', 'M', 'B', '6501', '1999', '8183', '5099', '9125', '9821']

23, 16, 8807, 21, 21, 8319, 5, 4, 7, 24, 331, 3, 13, 9233, 2669, 2177, 21, 9639, 22, 5197, 2441, 8149, 783, 8049, 9, 573, 4921, 13, 2, 6501, 1999, 8183, 5099, 9125, 9821