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: ['6851', 'Q', 'X', '907', '3123', '177', 'L', '7977', '4953', '4931', 'R', '3327']

SOLUTION: 6851, 17, 24, 907, 3123, 177, 12, 7977, 4953, 4931, 18, 3327

PROBLEM: ['z', 'F']

SOLUTION: 26, 6

PROBLEM: ['845', '4375', '9757', 'w', '2917', 'v', 'N', 'T', 'T', '5777', 'R', '5393', '2849', 'x', 'J', '1105', 'F', 'L', '4301', '7937', 'v', '1015', 'K', 'E', '8731', 'u', '2149', 'R', '1221', '151', 'a', 't']

SOLUTION:
845, 4375, 9757, 23, 2917, 22, 14, 20, 20, 5777, 18, 5393, 2849, 24, 10, 1105, 6, 12, 4301, 7937, 22, 1015, 11, 5, 8731, 21, 2149, 18, 1221, 151, 1, 20