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: ['A', '7109', '4449', 'j', 'V', '9939', 'k', '2707', 'Z', '9367', '2401', 'c', 'e', 'D', '9925', '9487', 'F', '7231']

1, 7109, 4449, 10, 22, 9939, 11, 2707, 26, 9367, 2401, 3, 5, 4, 9925, 9487, 6, 7231