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: ['s', 'R', '9099', '5549', '5855', '8177', '2037', 's', '4425', 'W']

19, 18, 9099, 5549, 5855, 8177, 2037, 19, 4425, 23