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', 'U', '8245', 'I', 'C', '5815', '5163', '3535', 'h', 'J', 'k', 'i', '5525', 'y', 's', 'u']

SOLUTION: 11, 21, 8245, 9, 3, 5815, 5163, 3535, 8, 10, 11, 9, 5525, 25, 19, 21

PROBLEM: ['S', 'D', '6375', '59', '8823', 's', '2591', '3923', '351', 'z', 'm', '1257', '1239', 'm', '2945', 'E']

SOLUTION: 19, 4, 6375, 59, 8823, 19, 2591, 3923, 351, 26, 13, 1257, 1239, 13, 2945, 5

PROBLEM: ['J', 'u', 'X', 'd', '2615', '5055', 'd', '141', 'R', '1695']

SOLUTION:
10, 21, 24, 4, 2615, 5055, 4, 141, 18, 1695