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: ['2515', 'a', 'e', 'n', '281', 'I', 'S', '8307', '3617', '6139', 'H', 'L', 'J', '4055', '9429', '5329', '9301', '2151', '5207', '1449', '4825', 'B', '7715', '4913', 'N', 'U', '9125', 'Y', '4343', 'R', 'x', 'f', '8727', '4801', 'G', 'x', '1377', '857', 'R', 'O']

SOLUTION: 2515, 1, 5, 14, 281, 9, 19, 8307, 3617, 6139, 8, 12, 10, 4055, 9429, 5329, 9301, 2151, 5207, 1449, 4825, 2, 7715, 4913, 14, 21, 9125, 25, 4343, 18, 24, 6, 8727, 4801, 7, 24, 1377, 857, 18, 15

PROBLEM: ['e', '7857', 'v', 'f', 'u', '1899', 'F', 'm', 'r', '3967', '6351', '7407', 'g', '3515', '5375', '621', 'o', '2239', 'm', 'j', 'i', 'I', 'r', '6435', '4887', '5847', '6375', 'w', '6839', '247', 'y', '8993', '1543', '3689', 'Y', '6383', '1401']

SOLUTION: 5, 7857, 22, 6, 21, 1899, 6, 13, 18, 3967, 6351, 7407, 7, 3515, 5375, 621, 15, 2239, 13, 10, 9, 9, 18, 6435, 4887, 5847, 6375, 23, 6839, 247, 25, 8993, 1543, 3689, 25, 6383, 1401

PROBLEM: ['g', '4055', 'g', 'D', '3185', 'z', 'k', '5345', 'P', '2919', 'f', '7931', 'P', 'G', 'W', '2385', '1043', '5979', '1583', 'C', '389', '4007', '9239', '975', '6425', '6917', 'd', '5093', 'T', 'm', 'V', 'B', '7875', '509', '9279', 'J']

SOLUTION:
7, 4055, 7, 4, 3185, 26, 11, 5345, 16, 2919, 6, 7931, 16, 7, 23, 2385, 1043, 5979, 1583, 3, 389, 4007, 9239, 975, 6425, 6917, 4, 5093, 20, 13, 22, 2, 7875, 509, 9279, 10