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: ['Z', '5931', 'a', '4343', 'u', 'H', '8917', '6781', 's', 'y', 'u', '1513', 'P', 'S', '1665', '5597', '6577', 'L', '7483', 'C', '5883', '5327', 'v', 'v', 'W', '1639', '693', '7347', 'I', '7521', '5959', 'S', '5803', '5517', '573', '9501', 'L', 'Q']

26, 5931, 1, 4343, 21, 8, 8917, 6781, 19, 25, 21, 1513, 16, 19, 1665, 5597, 6577, 12, 7483, 3, 5883, 5327, 22, 22, 23, 1639, 693, 7347, 9, 7521, 5959, 19, 5803, 5517, 573, 9501, 12, 17