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', 'f', 'N', 'a', 'H', '5999', 'g', '9589', 'N', 'h', '8451', '7797', 'e', 'P', '785']

SOLUTION: 11, 6, 14, 1, 8, 5999, 7, 9589, 14, 8, 8451, 7797, 5, 16, 785

PROBLEM: ['g', 'k', '4871', 'w', 'y', 'D', 'R', 'X', '5989', '5509', 'R', 'r', '6921', '5449', '3033', 'u', '1237', '5847', '583', 'L', '5649', 'l', 'V', '1763']

SOLUTION: 7, 11, 4871, 23, 25, 4, 18, 24, 5989, 5509, 18, 18, 6921, 5449, 3033, 21, 1237, 5847, 583, 12, 5649, 12, 22, 1763

PROBLEM: ['N', '9121', 'E', 'x', '4691', '3629', 'h', 'c', 'A', 'y', '789', 'n', 't', '9245', '7931', '6071', 'G', '4345', 'a', 'U', '6285', 'J', '9085', 'J', 'u', 'Z', '3593', '2873', 'p', '2603', '4543', '4773', '1199', 'W', 'j', '8945', 'H', '2805']

SOLUTION:
14, 9121, 5, 24, 4691, 3629, 8, 3, 1, 25, 789, 14, 20, 9245, 7931, 6071, 7, 4345, 1, 21, 6285, 10, 9085, 10, 21, 26, 3593, 2873, 16, 2603, 4543, 4773, 1199, 23, 10, 8945, 8, 2805