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', '7349', 'G', '8427', 'd', 'a', '5845', 't', '5809', 'E', 'D', 'G', '8655', '5781', '6037', 'b', '3203', 'p', '6191', 'D', '4323', 'j', 'N', 'u', '191', '7071', 'c', '5517', 'c', 'f', 'l', 'd', '9361', 'D', 'G', 'g', '1749', 'i', 'R', 'D']

14, 7349, 7, 8427, 4, 1, 5845, 20, 5809, 5, 4, 7, 8655, 5781, 6037, 2, 3203, 16, 6191, 4, 4323, 10, 14, 21, 191, 7071, 3, 5517, 3, 6, 12, 4, 9361, 4, 7, 7, 1749, 9, 18, 4