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: ['B', 'L', 'k', 'M', 'F', 'w', 'M', 'X', 'g', '203', '5847', 'F', 'p', 'E', 'C', '8907', 'k']

2, 12, 11, 13, 6, 23, 13, 24, 7, 203, 5847, 6, 16, 5, 3, 8907, 11