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', '5811', '8603', '8417', 'z', 'F', '3247', 'E', '1411', '6897', 'K', 'V', '7271', '1243', '5747', 'y', '5453']

SOLUTION: 18, 5811, 8603, 8417, 26, 6, 3247, 5, 1411, 6897, 11, 22, 7271, 1243, 5747, 25, 5453

PROBLEM: ['2769', 'p', '6953', '2529', '1113', '3487', '535', 'z', '8323', '9555', 'c', '6347', 'r', '9021', 'd', 'Z', 'j', '5955', 'r', '6651', '2745', 'u', 'B', '143', 'm', '4533']

SOLUTION: 2769, 16, 6953, 2529, 1113, 3487, 535, 26, 8323, 9555, 3, 6347, 18, 9021, 4, 26, 10, 5955, 18, 6651, 2745, 21, 2, 143, 13, 4533

PROBLEM: ['O', '7637', '5613', '3327', '7695', 'Y', 'i', 'c', 'S', 't', '7119', 'u', 'z', '7427', '8249', '5369', '5719', 'C', '8467', '4711', '343', '3133', '5345', 'Q', '1103', 'J', '1693', 'S', 'w', '9993', 'E']

SOLUTION:
15, 7637, 5613, 3327, 7695, 25, 9, 3, 19, 20, 7119, 21, 26, 7427, 8249, 5369, 5719, 3, 8467, 4711, 343, 3133, 5345, 17, 1103, 10, 1693, 19, 23, 9993, 5