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: ['n', '8573', 'M', 'k', '1235', 'U', '5393', 'S', 'N', 'g', 'C', 'S', 'S', '3465', 'O', 'u', 'f', 'n', '3549', 'L', 'v', '5255', '183', '991', '8683', '5113', '7461', '2907', '1355', '8465', '9435', 'N', 'R']

SOLUTION: 14, 8573, 13, 11, 1235, 21, 5393, 19, 14, 7, 3, 19, 19, 3465, 15, 21, 6, 14, 3549, 12, 22, 5255, 183, 991, 8683, 5113, 7461, 2907, 1355, 8465, 9435, 14, 18

PROBLEM: ['s', 't', 'B', '9613', 'G', 'Z', '9193', 'Z', 'X']

SOLUTION: 19, 20, 2, 9613, 7, 26, 9193, 26, 24

PROBLEM: ['8353', '3051', 'H', '4227', '6855', '5933', '2647', 'a', '6469', 'Z', 'L', '1185', 'C', '5969', '3743', '261', 't', '8559', 'n', '6719', 'S', 'Z', '8111', '5361', 'p', 'P', 'R', 'w', '4055', '9103', '1331', '6141', '2535', 'J', 'O', 'z', '349']

SOLUTION:
8353, 3051, 8, 4227, 6855, 5933, 2647, 1, 6469, 26, 12, 1185, 3, 5969, 3743, 261, 20, 8559, 14, 6719, 19, 26, 8111, 5361, 16, 16, 18, 23, 4055, 9103, 1331, 6141, 2535, 10, 15, 26, 349