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: ['9715', 'V', 'S', '6209', '3', '7749', '8967', '4709', 'M', '1611', 'k', '9109', 'A', 'o', '5667', 'c', '5465', '1951', '6981', 'z', '8727', 'n', 'B', '2961', 'w', '1957', 'F', '125', 'h', '4621', 's', 'o', 'm', '7851', '3849']

9715, 22, 19, 6209, 3, 7749, 8967, 4709, 13, 1611, 11, 9109, 1, 15, 5667, 3, 5465, 1951, 6981, 26, 8727, 14, 2, 2961, 23, 1957, 6, 125, 8, 4621, 19, 15, 13, 7851, 3849