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: ['7869', 'q', '7887', 'z', 'r', '7069', 'C', '2793', 'N']

SOLUTION: 7869, 17, 7887, 26, 18, 7069, 3, 2793, 14

PROBLEM: ['q', 'Y', 'l', 'M', 'L', 'p', 'z', 'h', 'Z', 'O', '7403', '9151', '653', '7039', '3831', 'g', '7635', '267', 'O', 'f', '9917', '3813', 'V', '5529', 'F', '1633', 'i', '1261', '8833', '7069', '6169', 'R', 'F', '4027', '3477']

SOLUTION: 17, 25, 12, 13, 12, 16, 26, 8, 26, 15, 7403, 9151, 653, 7039, 3831, 7, 7635, 267, 15, 6, 9917, 3813, 22, 5529, 6, 1633, 9, 1261, 8833, 7069, 6169, 18, 6, 4027, 3477

PROBLEM: ['2137', 'M', '5719', 'U', 'h', 'y', '6309', 'D', '9887', 'e', '1653', '8941', '9441', 'Y', 'u', 'K', 'A', 'x', 'B', 'n', 'K', '5837', 'W', 'n', '6309', 'o']

SOLUTION:
2137, 13, 5719, 21, 8, 25, 6309, 4, 9887, 5, 1653, 8941, 9441, 25, 21, 11, 1, 24, 2, 14, 11, 5837, 23, 14, 6309, 15