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: ['i', '1191', '9111', 'i', 'S', '3177', '2915', 'e', 'p', '6959', 'O', '8031', 't', '263', '2153', 'Q']

SOLUTION: 9, 1191, 9111, 9, 19, 3177, 2915, 5, 16, 6959, 15, 8031, 20, 263, 2153, 17

PROBLEM: ['f', '1287', '4749', 'Z', 'N', 'P', '5427', '3573', '4883', '6355', 'B', '2901', 'A', 'p', 'a', 'c', '1327', 'V', 'F', '873', '5635', '7393']

SOLUTION: 6, 1287, 4749, 26, 14, 16, 5427, 3573, 4883, 6355, 2, 2901, 1, 16, 1, 3, 1327, 22, 6, 873, 5635, 7393

PROBLEM: ['7147', '5625', 'j', 'B', 'z', 'k', '4011', '2207', '6035', '4485', 'A', 'm', 'p']

SOLUTION:
7147, 5625, 10, 2, 26, 11, 4011, 2207, 6035, 4485, 1, 13, 16