Alice congratulates Bob for finding lines which are perpendicular to themselves.

Bob walks away from the chalkboard and back to his seat but on the way, he suddenly stops.

Wait... if we can have lines which are perpendicular to themselves, can we have lines which are NOT parallel to themselves?

The class, who thought Bob was a genius after the last question, now laughed at him again. Bob dropped to the floor and started rolling around across the room.

But eventually, the laughter faded away once more and Alice, still standing tall with a bright smile on her face, responded again.

Yes, in fact, this was going to be my next challenge for you!

Can you find any line which is NOT parallel to itself?

Bob stood up once more and walked back to the chalkboard, ready to tackle Alice's second challenge.

Input Specification

There is no input.

Output Specification

Output one line containing the slope of any line which is NOT parallel to itself.