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.

['1315', '4337', '877', '1395', '5039', '5537', '2249', '187', 'k', '2499', 'j', 'I', '2609', 'i', '1405', '6159', 'O', 'h', '7567', 'u', '105', '4017', 'y', 'O', '3739', '2501', 'v', 'D', '8021']
1315, 4337, 877, 1395, 5039, 5537, 2249, 187, 11, 2499, 10, 9, 2609, 9, 1405, 6159, 15, 8, 7567, 21, 105, 4017, 25, 15, 3739, 2501, 22, 4, 8021

['Y', 'I', 'B', 'U', 'f', '5835', 'l', 'D', '3619', '5459', 'w', 'N', 'D', '7649', 'L', '8443', 'l', 's', 'm', 'K', 'L', '1997', '8041', '5875', 'L', 'r']
25, 9, 2, 21, 6, 5835, 12, 4, 3619, 5459, 23, 14, 4, 7649, 12, 8443, 12, 19, 13, 11, 12, 1997, 8041, 5875, 12, 18

['Q', 'k', '2833', '6299', '4353', 'N', '6531', '9867', 'P', 'n', '8147', 'S', 'N', '7787', 'm', '8773', 'l', '4237', 'H', '4277', 'w', '3323', '8913', 't', 'l', 'R', 's', '1127', 'P', '127', '5025']

17, 11, 2833, 6299, 4353, 14, 6531, 9867, 16, 14, 8147, 19, 14, 7787, 13, 8773, 12, 4237, 8, 4277, 23, 3323, 8913, 20, 12, 18, 19, 1127, 16, 127, 5025