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: ['G', 'P', '9587', '2465', 'C', 'q', 'o']

SOLUTION: 7, 16, 9587, 2465, 3, 17, 15

PROBLEM: ['1831', '545', 'k', '5975', 'Q', '6421', 'A', 'h', '9831', 'i', 'X', '3289', 'r', 'o', 'y', '7673']

SOLUTION: 1831, 545, 11, 5975, 17, 6421, 1, 8, 9831, 9, 24, 3289, 18, 15, 25, 7673

PROBLEM: ['B', 'i', '8095', '4847', '6749', '615', 'I', '9871', 'u', '4753']

SOLUTION:
2, 9, 8095, 4847, 6749, 615, 9, 9871, 21, 4753