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.

['O', '6049', '4915', '1573', '719', '2061', 'O', 'n', '6689', 'J', '4985', 'r', 'q', '6617', 'k', '2333', '183', '4549', '6053', '1075', '737', '6465', '5421']
15, 6049, 4915, 1573, 719, 2061, 15, 14, 6689, 10, 4985, 18, 17, 6617, 11, 2333, 183, 4549, 6053, 1075, 737, 6465, 5421

['6851', 'Q', 'X', '907', '3123', '177', 'L', '7977', '4953', '4931', 'R', '3327']
6851, 17, 24, 907, 3123, 177, 12, 7977, 4953, 4931, 18, 3327

['6885', '2817', '8933', 'r', 's', 'M', '397', 'k', 'D', 't', '8611', '1221', '1797']

6885, 2817, 8933, 18, 19, 13, 397, 11, 4, 20, 8611, 1221, 1797