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: ['J', '6243', 'G', 'V', 'K', '6277', 'c', '9637', 'B', 'i', 'U', '3459', 'L']

SOLUTION: 10, 6243, 7, 22, 11, 6277, 3, 9637, 2, 9, 21, 3459, 12

PROBLEM: ['6437', '3375', '6529', 'G', '3351', '5563', '5349', '4505', 'V', 'l', '2255', 's', '3691', 'c', 'w']

SOLUTION: 6437, 3375, 6529, 7, 3351, 5563, 5349, 4505, 22, 12, 2255, 19, 3691, 3, 23

PROBLEM: ['3895', '2319', 'm', '9653', 'c', 'E', '2729', '6023', '6893', 'a', 'I']

SOLUTION:
3895, 2319, 13, 9653, 3, 5, 2729, 6023, 6893, 1, 9