import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	
	 static boolean[][] dp;
	 static boolean[][] memo;
	 public static void main(String[] args) {
	      BufferedReader stdReader =new BufferedReader(new InputStreamReader(System.in));
	      try {
	    	  String[] temp = stdReader.readLine().split(" ");
	    	  int X = Integer.parseInt(temp[0]);
	    	  int Y = Integer.parseInt(temp[1]);
	    	  if(Math.abs(X)>6 || Math.abs(Y)>6){
	    		  System.out.println("NO");
	    		  return;
	    	  }
	    	  dp = new boolean[13][13];
	    	  memo = new boolean[13][13];
	    	  int[] dx = {-2,-2,-1,-1,1,1,2,2};
	    	  int[] dy = {-1,1,-2,2,-2,2,-1,1};
	    	  dp[6][6] = true;
	    	  memo[6][6] = true;
	    	  for(int i=0;i<3;i++){
	    		  setKnight(dx, dy);
	    	  }
	    	  System.out.println(dp[X+6][Y+6]?"YES":"NO");
	      } catch (IOException e) {
			e.printStackTrace();
	      }
	}
	 
	 public static void setKnight(int[] dx, int[] dy){
		for(int i=0;i<13;i++){
			for(int j=0;j<13;j++){
				if(dp[i][j] && memo[i][j]){
					for(int k=0;k<8;k++){
						dp[i+dx[k]][j+dy[k]] = true;
					}
				}
			}
		}  		  
 		 for(int i=0;i<13;i++){
 	   		  for(int j=0;j<13;j++){
 	   			  if(dp[i][j] && !memo[i][j]) memo[i][j] = true;		  
 	   		  }  		  
 		 }
	 } 
}