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: ['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: ['8055', '4605', '3505', '1047']

SOLUTION: 8055, 4605, 3505, 1047

PROBLEM: ['5239', 'N', 'x', 'a', 'q', '8527', '7611', 'd', 'E', '1235', 'D', '1565', 'x', 'G', '1303', 'G', 'g', 'W', 'q', 'B', 'z', 'Z', 'o', '2873']

SOLUTION:
5239, 14, 24, 1, 17, 8527, 7611, 4, 5, 1235, 4, 1565, 24, 7, 1303, 7, 7, 23, 17, 2, 26, 26, 15, 2873