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.

['7763', '493', 'Y', '1371']
7763, 493, 25, 1371

['1795', 'T', 'a', 'H', '9335', '1591', 'G', 'd', 'O', '9877', '6467', 'R', 'd', '6417', '2957', '8941', 'd', 'V', '3935', '5783', '6473', '7095', '8963', '5827', '1229', '9067', '6593', '351', '3989', 'A', 'h', 'k', 'k', 'P', '8613', 'I', '2089', 'U', 'U']
1795, 20, 1, 8, 9335, 1591, 7, 4, 15, 9877, 6467, 18, 4, 6417, 2957, 8941, 4, 22, 3935, 5783, 6473, 7095, 8963, 5827, 1229, 9067, 6593, 351, 3989, 1, 8, 11, 11, 16, 8613, 9, 2089, 21, 21

['5581', '4345', '645', '6203', '6587']

5581, 4345, 645, 6203, 6587