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: ['121', 'C', 'n', '7945', '4087', '8769', 'j', 'D', 'd', '551', 'o', 'O', 'N', '7281', '7441', 'E', '4613', '5059', 'U', 'a', 'b', '8095', 's', 'V', '6277', 'b', 'I', 'o', '6889', '5427', 'n', 's', 'N']

121, 3, 14, 7945, 4087, 8769, 10, 4, 4, 551, 15, 15, 14, 7281, 7441, 5, 4613, 5059, 21, 1, 2, 8095, 19, 22, 6277, 2, 9, 15, 6889, 5427, 14, 19, 14