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.

['u', 'i', 'l', 'p', '7463', 'R', '2161', 'N', 'u', '6427', 'V', '8073', '7299', '4171', '9911', '9277', 'Z', '5165', 'H', '7665', 'F', '2113', '3559', 'c', '8931']
21, 9, 12, 16, 7463, 18, 2161, 14, 21, 6427, 22, 8073, 7299, 4171, 9911, 9277, 26, 5165, 8, 7665, 6, 2113, 3559, 3, 8931

['O', '793', 'N', '2211', 'F', '7997', 'K', 'o', 'R', 'I', 'b', '5451', 'f', 'w', '1867', 'X', '1713', 's', 'W', '8361', 'T', '205', '2671', '575', 'i', '8159', '5405', '8013', '1379', '3769', '655', 'e', '729', '7145', '5123', '2125', 'q']
15, 793, 14, 2211, 6, 7997, 11, 15, 18, 9, 2, 5451, 6, 23, 1867, 24, 1713, 19, 23, 8361, 20, 205, 2671, 575, 9, 8159, 5405, 8013, 1379, 3769, 655, 5, 729, 7145, 5123, 2125, 17

['6015', 'a', '9263', 'x', 'l', 'u', 'k', 'A', '7879', 'W', 'a', '2791', '4999', 'd', 'T', '8847', '3791', '9167', '3137', '7699', 'b', 'l', '2269', 'h']

6015, 1, 9263, 24, 12, 21, 11, 1, 7879, 23, 1, 2791, 4999, 4, 20, 8847, 3791, 9167, 3137, 7699, 2, 12, 2269, 8