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: ['a', 'K', '9581', 'v', 'p', 'I', '2579', '7467', '2267', '3839', '9615', 'k', 'l', 'X', 'I']

SOLUTION: 1, 11, 9581, 22, 16, 9, 2579, 7467, 2267, 3839, 9615, 11, 12, 24, 9

PROBLEM: ['5209', 'd', 'C', 'x', '851', 'M', '8489', '9989', '6033', 'L', 'E', '9201', 'u', 'h', '1279', '9283', '9873', '259', '5015', '9735', 'R', 'J', '637', '4785', 'E', '4893', 'K', 'O']

SOLUTION: 5209, 4, 3, 24, 851, 13, 8489, 9989, 6033, 12, 5, 9201, 21, 8, 1279, 9283, 9873, 259, 5015, 9735, 18, 10, 637, 4785, 5, 4893, 11, 15

PROBLEM: ['R', 'i', '1469', 'r', '2993', '3671', 'R', '8187', 'i', 'Z', '8727', 'A', 'M', 'F', '4329', '2401', '5129', 'T', '1481', 'l', 'l', 'o', '8909', '7001', '3799', 'S']

SOLUTION:
18, 9, 1469, 18, 2993, 3671, 18, 8187, 9, 26, 8727, 1, 13, 6, 4329, 2401, 5129, 20, 1481, 12, 12, 15, 8909, 7001, 3799, 19