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: ['8009', 'o', '6901', 'X', '1811', 'w', '3315', '8691', '2749', '5773', 'R', '7421', '6187', '3941', '2457', '4299', '3079', 'X', 'o', '7241', 'n', 'b', 'I', 'r', '1141', 'd', '6549', '663', 'C', '7973', '547', '3701', '8427', '9397', '6781', 'p']

8009, 15, 6901, 24, 1811, 23, 3315, 8691, 2749, 5773, 18, 7421, 6187, 3941, 2457, 4299, 3079, 24, 15, 7241, 14, 2, 9, 18, 1141, 4, 6549, 663, 3, 7973, 547, 3701, 8427, 9397, 6781, 16