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: ['T', 'r', 'z', '5507', '5559', 'L', 'A', '6143', 'I', 'H', '5443', '7585', '5163', '815', 'C', 'j', 'v', 'x', '7719', '527', 'z', '7389', '2075', '7999', '8563', '4735']

20, 18, 26, 5507, 5559, 12, 1, 6143, 9, 8, 5443, 7585, 5163, 815, 3, 10, 22, 24, 7719, 527, 26, 7389, 2075, 7999, 8563, 4735