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', '3475', 'E', 'j', '3677', '1917', 'I', '8059', '4703', '3797', 'J', 'N', '8541', '4289', 'g', 'L', '4629', '6549', '5659']

26, 3475, 5, 10, 3677, 1917, 9, 8059, 4703, 3797, 10, 14, 8541, 4289, 7, 12, 4629, 6549, 5659