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: ['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: ['x', 'h', '1693', '5133', 'I', '1241', 't', '8635', '4501', 'R', '3991', '7139', 'F', '8893']

SOLUTION: 24, 8, 1693, 5133, 9, 1241, 20, 8635, 4501, 18, 3991, 7139, 6, 8893

PROBLEM: ['1141', 'D']

SOLUTION:
1141, 4