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.

['d', '903', 'N', 'n', '1959', 'U', 'Z', 'v', 'f', '6207', '4947', '9471', 'v', '481', 'Z', '163']
4, 903, 14, 14, 1959, 21, 26, 22, 6, 6207, 4947, 9471, 22, 481, 26, 163

['297', '6515', '5045', '9295', 'z', 'd', '4183', 'a', 'I', '9595', '957', '5687', 'r', 't', 'N', '8997', '8289', '4897', 'u', '4199', '2449', '5275']
297, 6515, 5045, 9295, 26, 4, 4183, 1, 9, 9595, 957, 5687, 18, 20, 14, 8997, 8289, 4897, 21, 4199, 2449, 5275

['O', 'm', 'Y', 'J', 'B', 'U', 'W', 'i', '7407', 'g', 'O', 'v', '9433', 'm', '4981', 'm']

15, 13, 25, 10, 2, 21, 23, 9, 7407, 7, 15, 22, 9433, 13, 4981, 13