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: ['2609', '8593', 'X', '365', '8173', '1859', '4371', 'M', '7949', 'O', 'D']

SOLUTION: 2609, 8593, 24, 365, 8173, 1859, 4371, 13, 7949, 15, 4

PROBLEM: ['4727', 'n', '983', '3675', 't', 'm', '2595', 'x', '9987', '2031', 'D', 'b', 'F', 'T', '3903', '6289', 'u', 'Y', 'l', '393', 'W', '8499', '1557', '7057', 'D', '5287', '2629']

SOLUTION: 4727, 14, 983, 3675, 20, 13, 2595, 24, 9987, 2031, 4, 2, 6, 20, 3903, 6289, 21, 25, 12, 393, 23, 8499, 1557, 7057, 4, 5287, 2629

PROBLEM: ['I', 'm', '6721', '3391', 'D', '6569', 'b', 'I', '6781', '6747', '4849', '7413', 'G', '7339', 'I', '2411', 'K', '9973', 'l', '3535', '2831', 'r', '7443', '3773', '9979', 'E', '929', 'k', 'X', 'y', '5701']

SOLUTION:
9, 13, 6721, 3391, 4, 6569, 2, 9, 6781, 6747, 4849, 7413, 7, 7339, 9, 2411, 11, 9973, 12, 3535, 2831, 18, 7443, 3773, 9979, 5, 929, 11, 24, 25, 5701