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: ['u', 'a', '9939', '9353', 'v', 'S', 'l', '981', 'P', 'q', 'M', 'w', '8419']

SOLUTION: 21, 1, 9939, 9353, 22, 19, 12, 981, 16, 17, 13, 23, 8419

PROBLEM: ['2067', '4119', 'P', '6271', '479', '2117', 'L', 'D', '9883', 't', 't', '9621', '1663', 'V', '8163', 'p', 'l', 'P', 'Z', 'Z', '3315', '5653', 'q', '9829', '7081', '9149', 'm', '6469', 'Q', '6813', '4487', 'Q']

SOLUTION: 2067, 4119, 16, 6271, 479, 2117, 12, 4, 9883, 20, 20, 9621, 1663, 22, 8163, 16, 12, 16, 26, 26, 3315, 5653, 17, 9829, 7081, 9149, 13, 6469, 17, 6813, 4487, 17

PROBLEM: ['2145', '5083', 'q', 'k', 'b', 'u', '7593', 'h', '1893', 'Z', '4499', 'm', 'H', 'i', '6207', '3481', '9233', '7151', 'T', '8015', 'h', 'O', '8239', 'U', '9467', 'z', '5431', '2961', 'h', '8991', 'K', 'X', 'Z', 'p', '2881']

SOLUTION:
2145, 5083, 17, 11, 2, 21, 7593, 8, 1893, 26, 4499, 13, 8, 9, 6207, 3481, 9233, 7151, 20, 8015, 8, 15, 8239, 21, 9467, 26, 5431, 2961, 8, 8991, 11, 24, 26, 16, 2881