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: ['5249', '4949', 'k', 'c', '5971', '2055', '9313', '6057', '1263', 'Q', '269', '3281', 'a', 'R', '2941', 'l', 't', 'T', 'w', 'e', 'W', '815', '7569', '8885', '7315', 'p', '8771', 'T', '5433', 'w', 'V', 'l', 'i', 'K', 'Q', '4269', 'z']

5249, 4949, 11, 3, 5971, 2055, 9313, 6057, 1263, 17, 269, 3281, 1, 18, 2941, 12, 20, 20, 23, 5, 23, 815, 7569, 8885, 7315, 16, 8771, 20, 5433, 23, 22, 12, 9, 11, 17, 4269, 26