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: ['9739', 'P', '1763', 'Z', '2895', 'X', 'C', '6433', '3375', '1617', 'z', 's', 'T', '5331', 'a', 'o', '7343', 'f', 'M', 'f', 'h', 'A', '4631', 'Z']

9739, 16, 1763, 26, 2895, 24, 3, 6433, 3375, 1617, 26, 19, 20, 5331, 1, 15, 7343, 6, 13, 6, 8, 1, 4631, 26