import java.io.*;
import java.util.*;
public class Problem5 {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner ( new FileReader ("DATA5.txt") ) ;
		PrintWriter pw = new PrintWriter ( new FileWriter ( "OUT5.txt" ) );
		
		

		for ( int i = 0; i < 5; i++ ) {
			int N = Integer.parseInt ( sc.next().trim() );
			int K = Integer.parseInt ( sc.next().trim() );
			
			BitSet bits = new BitSet(N);
			for ( int s = 0; s < K; s++ ){
				bits.flip(0, N+1);
			}
			
			boolean isOn = true;
			for ( int b = 0; b < N; b++ ){
				isOn &= bits.get(b);
			}
			
			if ( isOn ){
				pw.println("ON");
			}else{
				pw.println("OFF");
			}
			pw.flush();
		}
		
		pw.close();
		sc.close();
	}

}