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: ['2299', 'f', '1479', '8401', 'g', 'l', 'k', '379', '8951', 'H', '1317']

2299, 6, 1479, 8401, 7, 12, 11, 379, 8951, 8, 1317