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: ['2679', 'z', 'S', 'a', '9581', '4979', 'Y']

2679, 26, 19, 1, 9581, 4979, 25