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', '2701', '7141', 'H', '8293', 'W', '6543', '5383', '8455', 'I']

20, 2701, 7141, 8, 8293, 23, 6543, 5383, 8455, 9