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: ['9183', 'p', '9669', '6969', '8229', '5267', 'N', '4727', '1639', '491', '6837', '3045', 'f', 'g', 'v', 'M']

9183, 16, 9669, 6969, 8229, 5267, 14, 4727, 1639, 491, 6837, 3045, 6, 7, 22, 13