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

['p', '5493', '2947', 'Z', '8155', '747', 'R', '3199', 'J', 'F', '7579', 'r', '3903', '8923', 'd', '4307', '8331', '9981']
16, 5493, 2947, 26, 8155, 747, 18, 3199, 10, 6, 7579, 18, 3903, 8923, 4, 4307, 8331, 9981

['z', '6555', 'U', 'f', '1639', '1391', '4177', '1671', 'g', 'e', 'N', '1453', 'p', '3349', '6583', '2291', '1689', 'L', 'U', 'e', '4349', 'n', 'v', '5931', '8937', 'X', '7815', 'F', '5409', 'q']

26, 6555, 21, 6, 1639, 1391, 4177, 1671, 7, 5, 14, 1453, 16, 3349, 6583, 2291, 1689, 12, 21, 5, 4349, 14, 22, 5931, 8937, 24, 7815, 6, 5409, 17