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: ['4113', 'T', 'd', 'd', 'X', 'w', 'S', 'E', '4573', 'v', 'F', '7881', '1381', '3701', 't', 'N', '807', '3497', 'C', '3341', '529', 'M', '8529', 'B', 'l', 'M', 'T', '2033', '3011']

SOLUTION: 4113, 20, 4, 4, 24, 23, 19, 5, 4573, 22, 6, 7881, 1381, 3701, 20, 14, 807, 3497, 3, 3341, 529, 13, 8529, 2, 12, 13, 20, 2033, 3011

PROBLEM: ['U', '6153', 'e', 'C', '6445', '1229', '9463', 'U', 'O', 'd', 'h', 'r', '1221', 'q', 's', '151']

SOLUTION: 21, 6153, 5, 3, 6445, 1229, 9463, 21, 15, 4, 8, 18, 1221, 17, 19, 151

PROBLEM: ['2871', 'Q', 'C', 'm', 'F', 'v', 's', '7141', 'B', '1585', 'P', '7121']

SOLUTION:
2871, 17, 3, 13, 6, 22, 19, 7141, 2, 1585, 16, 7121