/* 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
	{
		for(int i = 2; i <= 17; i ++){
            boolean isPrime = true;
 
            for(int j = 2; j < i; j++){
                if(i % j == 0){
                    isPrime = false;
                    break;
                }
            }
 
            if(isPrime){
                System.out.println(i);
            }
        }
	}
}

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