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: ['5445', 'K', '679', '657', '5001', '7459', 'M', 'C', '9087', '9601', 't', '3897', '9389', '9521', '2603', 'c', '8607', 'K', '6809', 'L', 'Z', '1771', '1657', 'M', '1511', '2363', 't', 'U', '9793']

5445, 11, 679, 657, 5001, 7459, 13, 3, 9087, 9601, 20, 3897, 9389, 9521, 2603, 3, 8607, 11, 6809, 12, 26, 1771, 1657, 13, 1511, 2363, 20, 21, 9793