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', 'Z', '97', '6501', 'h', '9491', 'L', '8977', 'F', '591', 'Z', '9627', 'M', 'E', '6605', 'i', 'g', 'I', '1695', '2107', '5363', '7053', '7429', '1735', '7175', '1959', '3583', 'E', '147', 't', '6679', 'm', 'm', 'k', 'N']

20, 26, 97, 6501, 8, 9491, 12, 8977, 6, 591, 26, 9627, 13, 5, 6605, 9, 7, 9, 1695, 2107, 5363, 7053, 7429, 1735, 7175, 1959, 3583, 5, 147, 20, 6679, 13, 13, 11, 14