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: ['e', '989', '855', 'V', 'B', 'b', '8541', '6701', '6535', 'P', 'l', 'S', '1105', '2767', 'n', '27']

5, 989, 855, 22, 2, 2, 8541, 6701, 6535, 16, 12, 19, 1105, 2767, 14, 27