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: ['9455', '5653', '7883', 'G', 'p', 'E', '1529', 'z', 'O', '4253', '407', 'k', 'a', '3847', 'P', 'I', '4555', '9763', '5013', '3703', '1161', 'N', 'y', '5425', 'V', '4709']

9455, 5653, 7883, 7, 16, 5, 1529, 26, 15, 4253, 407, 11, 1, 3847, 16, 9, 4555, 9763, 5013, 3703, 1161, 14, 25, 5425, 22, 4709