Score: $100$ points
Takahashi is solving quizzes. He has easily solved all but the last one.
The last quiz has three choices: $1$, $2$, and $3$.
With his supernatural power, Takahashi has found out that the choices $A$ and $B$ are both wrong.
Print the correct choice for this problem.
Input is given from Standard Input in the following format:
Print the correct choice.
When we know $3$ and $1$ are both wrong, the correct choice is $2$.