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: ['1941', '6659', '8525', 'u', '7107', 'o', 'h', '2195', '6837', '3191', '543', '7151', '7301', 'L', 'V', 'J', '9549', 'E', '4701', 'L', 'k', 'x', 'i', '6573', 'b', '5647', 'D', 'X', '4737', '9077', '6235', 'O', '7901', 'd', 'm', '2623', '4781', 'P', 'z']

1941, 6659, 8525, 21, 7107, 15, 8, 2195, 6837, 3191, 543, 7151, 7301, 12, 22, 10, 9549, 5, 4701, 12, 11, 24, 9, 6573, 2, 5647, 4, 24, 4737, 9077, 6235, 15, 7901, 4, 13, 2623, 4781, 16, 26