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: ['6827', 'N', 'r', '4413', '3321', '7151', '9803', 'j', 'e', '3691', 's', 'K', '2503', '8727', '8269', '1817', 'd', '79', 'K', 'j', 'V', 'i', 'B', 'c', 'J', 'q', 'a', '2529', '87', 'W', '5949', 'i', '2943', '7999']

6827, 14, 18, 4413, 3321, 7151, 9803, 10, 5, 3691, 19, 11, 2503, 8727, 8269, 1817, 4, 79, 11, 10, 22, 9, 2, 3, 10, 17, 1, 2529, 87, 23, 5949, 9, 2943, 7999