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: ['2305', '5409', 'g', '5185', 'O', 'H', 'w', '661', 'k', '6463', '6133', 'Z', '5761', 'c', 'O', 'x', 'U', '8783', 'p', 'f', 'Y', 'L', '9299', 'H', 'l', 't']

2305, 5409, 7, 5185, 15, 8, 23, 661, 11, 6463, 6133, 26, 5761, 3, 15, 24, 21, 8783, 16, 6, 25, 12, 9299, 8, 12, 20