TASK DEFINITION: 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.
PROBLEM: ['5273', '5539', '993', '8787', 'r', '1413', '3931', 'z', 'g', 'c', 'D', '9909', 'a', 'V', '1657', '2823', 'e', 't', 't', 'b', '3771', '1177', 'f', '855']

SOLUTION: 5273, 5539, 993, 8787, 18, 1413, 3931, 26, 7, 3, 4, 9909, 1, 22, 1657, 2823, 5, 20, 20, 2, 3771, 1177, 6, 855

PROBLEM: ['565', '6701', 'P', 'Z', 's', '6915', '7931', '1403', '8957', '8999', 'K', 'p', 'M', 'f', '3551', '9433', 'j', '8891', '883', '7883', '8595', '7429', 'w', '4289', '5903']

SOLUTION: 565, 6701, 16, 26, 19, 6915, 7931, 1403, 8957, 8999, 11, 16, 13, 6, 3551, 9433, 10, 8891, 883, 7883, 8595, 7429, 23, 4289, 5903

PROBLEM: ['C', 'A', '1665', 'N', 'w', 'f', 'n', '607', '1897', 'h', 'b', 'I', '9807', 'h', '3333', '9279', 'f', '4355', 'z', '3789', 'K', 'p', 'v', 'V', '8333', '4865', '5633']

SOLUTION:
3, 1, 1665, 14, 23, 6, 14, 607, 1897, 8, 2, 9, 9807, 8, 3333, 9279, 6, 4355, 26, 3789, 11, 16, 22, 22, 8333, 4865, 5633