In this task, you are given a country name, and you need to return the year in which the country became independent. Independence is a nation's independence or statehood, usually after ceasing to be a group or part of another nation or state, or more rarely after the end of military occupation.

Ex Input:
Namibia

Ex Output:
1990


Ex Input:
Tonga

Ex Output:
1970


Ex Input:
Sudan

Ex Output:

1956