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: ['7081', '4441', '831', '7393', '6143', 'z', 'u', '2285', '9305', 'g', '8581', 'z', 'O', 'D', 'p', '6883', '5507', '2821', '6257', '3819', 'R', '7039', 'a', '5585', 'w', 'P', '7851', 'r', '7727', '8363', 'R', 'a', '2725', 'w', 'H', 'z']

7081, 4441, 831, 7393, 6143, 26, 21, 2285, 9305, 7, 8581, 26, 15, 4, 16, 6883, 5507, 2821, 6257, 3819, 18, 7039, 1, 5585, 23, 16, 7851, 18, 7727, 8363, 18, 1, 2725, 23, 8, 26