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', '1531', 't', '6929', 'P', '9619', 'G', 'g', '8511']

SOLUTION: 21, 1531, 20, 6929, 16, 9619, 7, 7, 8511

PROBLEM: ['I', 'c', '5325', '3723', 'r', '3613', '4509', '1935', 'l', '8285', 'r', '9159', '3557', 'z', '5397', '3805', 'S', 'f', 'L', '5169', '1893', 'I', '3845', 'C', '2679', '3489', '7829', 'V', '3589', '7651', '1185', '5641', 'F', 'h', 'Q', '1807']

SOLUTION: 9, 3, 5325, 3723, 18, 3613, 4509, 1935, 12, 8285, 18, 9159, 3557, 26, 5397, 3805, 19, 6, 12, 5169, 1893, 9, 3845, 3, 2679, 3489, 7829, 22, 3589, 7651, 1185, 5641, 6, 8, 17, 1807

PROBLEM: ['7977', '8061', 'f', 'z', '5347', '7479', 'f', 'B', '1079', 'n', 'b', 'S', 'C', 'b', '8559', '829', '3095', '9821', 'B', '5401', '6247', '3309', '8923', '7993', '4267', '9843', '1687', '289', 'F', 'q']

SOLUTION:
7977, 8061, 6, 26, 5347, 7479, 6, 2, 1079, 14, 2, 19, 3, 2, 8559, 829, 3095, 9821, 2, 5401, 6247, 3309, 8923, 7993, 4267, 9843, 1687, 289, 6, 17