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.

['6239', 'I', '6021', 'e', 'C', 'D', 'n', 'C', 'k', '5171', 'K', '3579', '1607', '7349', '3179', 'N', 'i', '8067', 'D', 'c', 'P', 'K', 'W', '2487', 'G', 'e', '2385', 'A', 'o']
6239, 9, 6021, 5, 3, 4, 14, 3, 11, 5171, 11, 3579, 1607, 7349, 3179, 14, 9, 8067, 4, 3, 16, 11, 23, 2487, 7, 5, 2385, 1, 15

['9579', 'B', 'q', '181', '2955', 'q', 'I', 'L', 'g', '1357', '5797', '7917', 'd', '5745', '5591', '5687', 'a', '1219', 'd', '3849', 'z', '4695', 'j', '4133', '8689', 'r', 'W', 'I', 'p', '9971', '5525']
9579, 2, 17, 181, 2955, 17, 9, 12, 7, 1357, 5797, 7917, 4, 5745, 5591, 5687, 1, 1219, 4, 3849, 26, 4695, 10, 4133, 8689, 18, 23, 9, 16, 9971, 5525

['3475', 'L', 'L', '3617', '8211', '3593', 'y', '7129', '9297', 'E', 'f', 'b', 'E', 'Q', '2227', '299', 'b', '5683', '8213', '1061', '4047', 't', '4553', '8429', 'U', 'B', 'q', '9583', 'B', '5521', 'T', 'P', '6999', '2453', 'D', 'd', 'k', 'U', '673']
3475, 12, 12, 3617, 8211, 3593, 25, 7129, 9297, 5, 6, 2, 5, 17, 2227, 299, 2, 5683, 8213, 1061, 4047, 20, 4553, 8429, 21, 2, 17, 9583, 2, 5521, 20, 16, 6999, 2453, 4, 4, 11, 21, 673