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

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

PROBLEM: ['x', '4435', '9457', '8551', 'k', 's', '2725', 'G', '8061', 'i', 'E', '5599', 'G', '4895', '2599', '6533', 'n', 'f', 'B', 'e', 'u', 's', 'a']

SOLUTION: 24, 4435, 9457, 8551, 11, 19, 2725, 7, 8061, 9, 5, 5599, 7, 4895, 2599, 6533, 14, 6, 2, 5, 21, 19, 1

PROBLEM: ['j', 'i', 'R', '5543', '8151', '2645', '6153', 't', '3823', 'D', '2549', 'O', '3299', 't', 'l', '9817', '9745', '1887', 'K', '8041', 'l', '3289', 'l', '859', '9913', '3299', 'o', 'i']

SOLUTION:
10, 9, 18, 5543, 8151, 2645, 6153, 20, 3823, 4, 2549, 15, 3299, 20, 12, 9817, 9745, 1887, 11, 8041, 12, 3289, 12, 859, 9913, 3299, 15, 9