Problem Description

Give you two numbers A and B, if A is equal to B, you should print "YES", or print "NO".

Input

each test case contains two numbers A and B.

Output

for each case, if A is equal to B, you should print "YES", or print "NO".

1 2
2 2
3 3
4 3

NO
YES
YES
NO

Author

8600 && xhd