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: ['1363', '8307', '8597', '291', '3191', '137', 'C', '5335', '2567', 'E', 'T', '6419', '431', '309', '39', '159', 'I', '1817', 'j', '8719', 'z']

1363, 8307, 8597, 291, 3191, 137, 3, 5335, 2567, 5, 20, 6419, 431, 309, 39, 159, 9, 1817, 10, 8719, 26