Didn't like quadrants in B005 or trigonometry in B006? Good news! This task combines both!

We only consider the trigonometric ratios $ \sin $, $ \cos $ and $ \tan $ in this task.

It is known that:

• In Qudrant I, $ \sin{\theta} \gt 0 $, $ \cos{\theta} \gt 0 $ and $ \tan{\theta} \gt 0 $.
• In Quadrant II, $ \sin{\theta} \gt 0 $, $ \cos{\theta} \lt 0 $ and $ \tan{\theta} \lt 0 $.
• In Quadrant III, $ \sin{\theta} \lt 0 $, $ \cos{\theta} \lt 0 $ and $ \tan{\theta} \gt 0 $.
• In Quadrant IV, $ \sin{\theta} \lt 0 $, $ \cos{\theta} \gt 0 $ and $ \tan{\theta} \lt 0 $.

Given the sign of any two trigonometric ratios in one of the quadrants, determine the sign of the remaining trigonometric ratio in the same quadrant.

Input

The two lines of input are both in the form f s, where f is either sin, cos or tan, and s is either + or -.
f and s denote the trignometric ratio and its sign respectively.
It is guaranteed that the two trigonometric ratios are distinct.

Output

Output + or -, indicating the sign of the remaining trigonometric ratio.