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: ['3573', '6577', '3359', '8603', 'c', 'p', '5471', 'g', 'D', 'R', 'M', '4907', '3095', '2061', '8137', '5001', 't', 'Q', '6177', 'B', '1553', 'a', '993', 'q', '727', 'l', '141', 'V', 'V', 'C', 'Q', '7919', 'O', 'M', 'o', 'z', 'Z', '5639']

SOLUTION: 3573, 6577, 3359, 8603, 3, 16, 5471, 7, 4, 18, 13, 4907, 3095, 2061, 8137, 5001, 20, 17, 6177, 2, 1553, 1, 993, 17, 727, 12, 141, 22, 22, 3, 17, 7919, 15, 13, 15, 26, 26, 5639

PROBLEM: ['871', 'f', '2705', '773', '1661']

SOLUTION: 871, 6, 2705, 773, 1661

PROBLEM: ['6033', '253', '6337', 'g', 'a', 'd', '2567', 'W', 'H', 'y', '1201', '6869']

SOLUTION:
6033, 253, 6337, 7, 1, 4, 2567, 23, 8, 25, 1201, 6869