/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes 
		Scanner s=new Scanner(System.in);
		int num=s.nextInt();
		int flag=0;
		for(int i=2;i<num/2;i++)
		{
			if(num%i==0)
			{
				System.out.println("not a prime");
				flag=1;
				break;
			}
		}if(flag==0)
		{
			System.out.println("is prime");
		}
	}
}

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Mw==

3