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.
Input: ['X', 'u', 'W', 'c', '6535', '6323', '6263', 'F', '3023', 'P', 'I', 'C', '999', '4421', '4761', '1863', '9535', '5089', '3125', '2611', '881', 'g', '6695', '9123', 'a', 'G', '5121', '1143', '4677', 'T', '7423', 'C', '1107', 'X', '4345', '1415', '8681', 'q', 'B']

24, 21, 23, 3, 6535, 6323, 6263, 6, 3023, 16, 9, 3, 999, 4421, 4761, 1863, 9535, 5089, 3125, 2611, 881, 7, 6695, 9123, 1, 7, 5121, 1143, 4677, 20, 7423, 3, 1107, 24, 4345, 1415, 8681, 17, 2