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: ['g', '9107', '351', 'a', '8693', 'O', 'I', '3675', '3883', '2709', '3999', '8265', '7627', '7041', '7799', 'U']

SOLUTION: 7, 9107, 351, 1, 8693, 15, 9, 3675, 3883, 2709, 3999, 8265, 7627, 7041, 7799, 21

PROBLEM: ['4867', 'Y', 't', '8365', 'f', '9409', 'H', '1913', 'J', 'F', 'w']

SOLUTION: 4867, 25, 20, 8365, 6, 9409, 8, 1913, 10, 6, 23

PROBLEM: ['Z', '6355', '975', 'f']

SOLUTION:
26, 6355, 975, 6