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', '9127', 'k', '9641', 'h', '6137', 's', 'E', 'N', 'D', 's', 'Y', '9669', 'Z', 'c', '3553', '2105', '4519', '1969', '1545', 'f', 'v', '4571', 'S', 'O', 'd', 'r', 'I', 'I', '2105']

SOLUTION: 14, 9127, 11, 9641, 8, 6137, 19, 5, 14, 4, 19, 25, 9669, 26, 3, 3553, 2105, 4519, 1969, 1545, 6, 22, 4571, 19, 15, 4, 18, 9, 9, 2105

PROBLEM: ['V', '3471', '1007', '1937', 'Y', '3529', 'M', '9079', '129', 'j', '3991', 'X', 'h', '3647', 'C', 'l', 'Z', 'E', '6169', '4729']

SOLUTION: 22, 3471, 1007, 1937, 25, 3529, 13, 9079, 129, 10, 3991, 24, 8, 3647, 3, 12, 26, 5, 6169, 4729

PROBLEM: ['D', '7407', 'f', 'X', 'j', 'N', 'B', '6413', '6805', '3719', '6159', '311', '129', 'S', 'q', 'Z']

SOLUTION:
4, 7407, 6, 24, 10, 14, 2, 6413, 6805, 3719, 6159, 311, 129, 19, 17, 26