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: ['3011', '4131', 'P', '517', '6551', '4615', 't', 'P', 'Z', 'q', 'H', 'r', 'K', '2069', 'A', 'C', 'T', 'C', 'W', 'p', '309', 'b', 'u', 'x', 'Y', 'i']

3011, 4131, 16, 517, 6551, 4615, 20, 16, 26, 17, 8, 18, 11, 2069, 1, 3, 20, 3, 23, 16, 309, 2, 21, 24, 25, 9