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: ['K', 'z', '7579', '7945', 'K', '5633', 'G', '7211', '9855', 'c', '4155']

SOLUTION: 11, 26, 7579, 7945, 11, 5633, 7, 7211, 9855, 3, 4155

PROBLEM: ['P', '4337', 'q', '9481', '7859', 'E', '1813', '2611', '1647', 'X', '4807', '253', '3465', 'o', 'p', 'z', 'K', 'z', 'P', 'l', 'Z', '5635', '7601', 'u', 'e', '2255', 'v', '6357', 'S']

SOLUTION: 16, 4337, 17, 9481, 7859, 5, 1813, 2611, 1647, 24, 4807, 253, 3465, 15, 16, 26, 11, 26, 16, 12, 26, 5635, 7601, 21, 5, 2255, 22, 6357, 19

PROBLEM: ['5285', '3053', 'S', 't', '7551']

SOLUTION:
5285, 3053, 19, 20, 7551