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: ['K', 'E', '6735', '6095', '9533', 'P', '6853', '5261', 'i', '6541', '8221', 'G', 'x', '7249', '2677', 'O', '689', 'X', '9767', 'z', 'g', '7675', '4797', 'h', 'Q', '8007', 'O', '6817', 'v', 'a', 'H', '5473', '9749', 't', 'I', 'G', 'k', '8063', 'T']

SOLUTION: 11, 5, 6735, 6095, 9533, 16, 6853, 5261, 9, 6541, 8221, 7, 24, 7249, 2677, 15, 689, 24, 9767, 26, 7, 7675, 4797, 8, 17, 8007, 15, 6817, 22, 1, 8, 5473, 9749, 20, 9, 7, 11, 8063, 20

PROBLEM: ['S', '8419', 'p', '2659', 'y', 'e', '3697', '4945', 'S', '6933', 'W', '9691', 'S', '265', 'a', '7625']

SOLUTION: 19, 8419, 16, 2659, 25, 5, 3697, 4945, 19, 6933, 23, 9691, 19, 265, 1, 7625

PROBLEM: ['O', 'u']

SOLUTION:
15, 21