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: ['s', 't', 'B', '9613', 'G', 'Z', '9193', 'Z', 'X']

SOLUTION: 19, 20, 2, 9613, 7, 26, 9193, 26, 24

PROBLEM: ['c', 'W', '9815', 'X', 'q', '8309', '7153', 'G', '7877', '6843', 'E', '7631', '4251', '9299', 'y']

SOLUTION: 3, 23, 9815, 24, 17, 8309, 7153, 7, 7877, 6843, 5, 7631, 4251, 9299, 25

PROBLEM: ['F', 'T', '3039', '6349', '4619', 'P', 'B', 't', 'x', '2115', 'F', '4247', '5685', 'P', 'o', '3431', '3217', 'O', 'P', '2181', '6459', '2415', 'z']

SOLUTION:
6, 20, 3039, 6349, 4619, 16, 2, 20, 24, 2115, 6, 4247, 5685, 16, 15, 3431, 3217, 15, 16, 2181, 6459, 2415, 26