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: ['8263', 'b', '929', '1715', 'F', '4609', 'A', 'B', 'w', 'i', '4627', 'u', '881', 'f', 'r', 'F', '73', 't', '1211']

8263, 2, 929, 1715, 6, 4609, 1, 2, 23, 9, 4627, 21, 881, 6, 18, 6, 73, 20, 1211