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', 'P', 'n', 'P', '537', '6431', 'u', 'Y']

SOLUTION: 21, 16, 14, 16, 537, 6431, 21, 25

PROBLEM: ['2067', '4119', 'P', '6271', '479', '2117', 'L', 'D', '9883', 't', 't', '9621', '1663', 'V', '8163', 'p', 'l', 'P', 'Z', 'Z', '3315', '5653', 'q', '9829', '7081', '9149', 'm', '6469', 'Q', '6813', '4487', 'Q']

SOLUTION: 2067, 4119, 16, 6271, 479, 2117, 12, 4, 9883, 20, 20, 9621, 1663, 22, 8163, 16, 12, 16, 26, 26, 3315, 5653, 17, 9829, 7081, 9149, 13, 6469, 17, 6813, 4487, 17

PROBLEM: ['8811', '2469', 'U', 'k', 'S', '2885', '3971', '575', '7613', 'g', 'e', '2323', '2415', 'a', 'r', 'V', 'b', '6659', '4763', '1157', '9837', '7157', '739', '4443', '5809', '6525', 'f', '2247', '581', 'P', 'Q', 'J', '2353', '1685', '7705', 'v', '5789']

SOLUTION:
8811, 2469, 21, 11, 19, 2885, 3971, 575, 7613, 7, 5, 2323, 2415, 1, 18, 22, 2, 6659, 4763, 1157, 9837, 7157, 739, 4443, 5809, 6525, 6, 2247, 581, 16, 17, 10, 2353, 1685, 7705, 22, 5789