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: ['8047', 'k', 'd', 'x', 'u', '955', 'L', '197', '3361', 's', '9811', 'N', 'l', '1279', 'z', 'D', '3259', '8629']

8047, 11, 4, 24, 21, 955, 12, 197, 3361, 19, 9811, 14, 12, 1279, 26, 4, 3259, 8629