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: ['N', '1147', '3013', 'K', '3955', '3583', '3263', 'H', 'K', 'N', '9679', 'B', 'S', 'E', 'D', 'f', 'N', '8017', '7141', '3537', 'f', '8415', '2831', 'j', '8661']

14, 1147, 3013, 11, 3955, 3583, 3263, 8, 11, 14, 9679, 2, 19, 5, 4, 6, 14, 8017, 7141, 3537, 6, 8415, 2831, 10, 8661