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: ['2729', 'K', '1143', 'g', '3829']

SOLUTION: 2729, 11, 1143, 7, 3829

PROBLEM: ['u', '6687', '2277', 'o', '7787', 'Z', 'b', 'I', '9983', 'N']

SOLUTION: 21, 6687, 2277, 15, 7787, 26, 2, 9, 9983, 14

PROBLEM: ['Q', 'K', '475', 'Z', 'S', '4369']

SOLUTION:
17, 11, 475, 26, 19, 4369