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: ['565', '6701', 'P', 'Z', 's', '6915', '7931', '1403', '8957', '8999', 'K', 'p', 'M', 'f', '3551', '9433', 'j', '8891', '883', '7883', '8595', '7429', 'w', '4289', '5903']

SOLUTION: 565, 6701, 16, 26, 19, 6915, 7931, 1403, 8957, 8999, 11, 16, 13, 6, 3551, 9433, 10, 8891, 883, 7883, 8595, 7429, 23, 4289, 5903

PROBLEM: ['4511', '3187', 'A', '4469', '7071', 'd', '3401', '4495', 'D', 'O', '1637', 'X', '4547', '4637', 'S', 'D', '4555', '7091', 'N', '1603', 'n', 'O', '429', '6795', 'm', '8921', '5357', '101', '7671', '7121', '2667']

SOLUTION: 4511, 3187, 1, 4469, 7071, 4, 3401, 4495, 4, 15, 1637, 24, 4547, 4637, 19, 4, 4555, 7091, 14, 1603, 14, 15, 429, 6795, 13, 8921, 5357, 101, 7671, 7121, 2667

PROBLEM: ['r', '6733', 'Z', 'M', '5265']

SOLUTION:
18, 6733, 26, 13, 5265