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: ['r', '821', '8521', 'p', 'o', '979', 'k', 'w', '2213']

SOLUTION: 18, 821, 8521, 16, 15, 979, 11, 23, 2213

PROBLEM: ['7061', '5857', 'V', 'k', 'N', '4711', 's', '6883', '1971', '2181', '7797', '8327', 'l', '5015', 'y', 'P', 'G', '2781', '1835', '745', 'd', 'c', '595', '7335', '6619', '6215', 'b', '1151', 'z', '6817', '4439']

SOLUTION: 7061, 5857, 22, 11, 14, 4711, 19, 6883, 1971, 2181, 7797, 8327, 12, 5015, 25, 16, 7, 2781, 1835, 745, 4, 3, 595, 7335, 6619, 6215, 2, 1151, 26, 6817, 4439

PROBLEM: ['2405', '6771', '5097', 'w', '6341', '4817', '3227', 'b', 'T', '3617', 'r', 'o', 'b', '6381', 'F', 'H']

SOLUTION:
2405, 6771, 5097, 23, 6341, 4817, 3227, 2, 20, 3617, 18, 15, 2, 6381, 6, 8