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: ['z', '151', '1757', '4099', 'a', '2251', '19', 'Z', '8761', 'b', 'H', '7587', 'X', '4003', 'o', 'w', 'X', '5343', 's', '7709', '2105', 'n', 'O', '7841', '555', 'p', '8663', '9389', '1233', '4101', '8177', 'e', '2709', 'f', '567', 'd', '8217', 'c', 'C']

26, 151, 1757, 4099, 1, 2251, 19, 26, 8761, 2, 8, 7587, 24, 4003, 15, 23, 24, 5343, 19, 7709, 2105, 14, 15, 7841, 555, 16, 8663, 9389, 1233, 4101, 8177, 5, 2709, 6, 567, 4, 8217, 3, 3