Please solve the problem in Java code $.$Description

Bessie the cow is helping Farmer John run the USA Cow Olympiad $($USACO$),$ an on$-$line contest where participants answer challenging questions to demonstrate their mastery of bovine trivia.

can start everyone out at the right level any time he holds a contest.

contest. Please help her perform this computation!

Input

after the contest. The third line specifies the number of gold participants before and after the contest. The last line specifies the number of platinum participants before and after the contest.

Output

gold. The last line should contain the number of participants who were promoted from gold to platinum.

Sample Input $1$

$1,2$

$1,1$

$11$

$1,1$

$1,2$

$12$

Hint

ne was promoted all the way to platinum, and the other stayed in bronze.

Source

USACO $2016$ January Contest, Bronze