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: ['7029', 'E', 'I', '5123', 'p', 'n', '6859', 't', 'f', '1171', '4573', '9479', 'h', 'Y', '1133', '7847', 'a']

7029, 5, 9, 5123, 16, 14, 6859, 20, 6, 1171, 4573, 9479, 8, 25, 1133, 7847, 1