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: ['r', '821', '8521', 'p', 'o', '979', 'k', 'w', '2213']

SOLUTION: 18, 821, 8521, 16, 15, 979, 11, 23, 2213

PROBLEM: ['W', 'Y']

SOLUTION: 23, 25

PROBLEM: ['m', '8257', '1791', 'Z', '6663', '6185', '4351', 'M', '3433', '961', 'n', '181', '1369', 'f', '9103', '6117', 'p', 'H', 'S', 'L', '9297', 'O', 'N', 'A', '1175', '1011', '2433', 'X', 'x', 'Z', 'Z', '5099', '9149', 'V']

SOLUTION:
13, 8257, 1791, 26, 6663, 6185, 4351, 13, 3433, 961, 14, 181, 1369, 6, 9103, 6117, 16, 8, 19, 12, 9297, 15, 14, 1, 1175, 1011, 2433, 24, 24, 26, 26, 5099, 9149, 22