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: ['x', 'h', '1693', '5133', 'I', '1241', 't', '8635', '4501', 'R', '3991', '7139', 'F', '8893']

SOLUTION: 24, 8, 1693, 5133, 9, 1241, 20, 8635, 4501, 18, 3991, 7139, 6, 8893

PROBLEM: ['y', '4985', '9713', '7025', 'p', '1293', '1295', 'B', '9121', '959', '4609', 'I', '5301', '1509', '5323', 'I', '9749', '2597', '2343', '6085', 'A', 'Q', '6549', 's', 'W', '5867', 's', 'i', '2631', 'H', 'h', '8253', '8521', 'I', '6845', '5819', '8325', '947']

SOLUTION:
25, 4985, 9713, 7025, 16, 1293, 1295, 2, 9121, 959, 4609, 9, 5301, 1509, 5323, 9, 9749, 2597, 2343, 6085, 1, 17, 6549, 19, 23, 5867, 19, 9, 2631, 8, 8, 8253, 8521, 9, 6845, 5819, 8325, 947