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: ['4323', '1749', '7223', 'n', 'V', 'j', '7871', 'j', 'J', 'I', '6363', 'P', '1243', 'x', '1887']

4323, 1749, 7223, 14, 22, 10, 7871, 10, 10, 9, 6363, 16, 1243, 24, 1887