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: ['u', 'n', '2763', 'n', '5869', 'w', '4847', '4369', '8245', '9801', 'W', '7991', 't', '9233', 'Z', '3521', 'Z', 'H', 'N', 'a', '9811', '5705', '6637', '5067', 'o']

SOLUTION: 21, 14, 2763, 14, 5869, 23, 4847, 4369, 8245, 9801, 23, 7991, 20, 9233, 26, 3521, 26, 8, 14, 1, 9811, 5705, 6637, 5067, 15

PROBLEM: ['c', 'e', '8741', 'F', 'O', '407', '4435', '1887', 'O', '1193', '1821', '8135', '6717', 't', 'J', '6767', '639', 'q', '4145', '85', '3571', 'L', '2501', 'Y']

SOLUTION: 3, 5, 8741, 6, 15, 407, 4435, 1887, 15, 1193, 1821, 8135, 6717, 20, 10, 6767, 639, 17, 4145, 85, 3571, 12, 2501, 25

PROBLEM: ['M', '4979', 'Y', '6735', 'e', '269', 'K', 'E', 'k', 'K', '6869', '4463', 'l', 'G', '8291', 'y', '5515', 'i', '5377', '8863', '7595', 'Y', 'M', '2187', '9017', '3679', 's', 'Y', '2067', '361']

SOLUTION:
13, 4979, 25, 6735, 5, 269, 11, 5, 11, 11, 6869, 4463, 12, 7, 8291, 25, 5515, 9, 5377, 8863, 7595, 25, 13, 2187, 9017, 3679, 19, 25, 2067, 361