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: ['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: ['o', '9845', '1599', '7901', '4987', '17', '2053', 'm', 'l', '1923', '9157', '817', '5361', '655', '2393', '8321', 's', '8605', 'l']

SOLUTION: 15, 9845, 1599, 7901, 4987, 17, 2053, 13, 12, 1923, 9157, 817, 5361, 655, 2393, 8321, 19, 8605, 12

PROBLEM: ['8849', '3759', '1355', 'd', 'n', '5979', 'k', 'Q', 'B', '1767', '3291', 'X', '8899', '5783', '5441', '3207', '8827', '9325', '5607', '4129', 'b', '9189', '3787', '2857', 'y', 'o', 'I', '6651']

SOLUTION:
8849, 3759, 1355, 4, 14, 5979, 11, 17, 2, 1767, 3291, 24, 8899, 5783, 5441, 3207, 8827, 9325, 5607, 4129, 2, 9189, 3787, 2857, 25, 15, 9, 6651