/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
import static java.
lang.
Math.
*;
class Ideone {
public static void main
(String[] args
) { Scanner sc
= new Scanner
(System.
in); double x,y;
x = sc.nextInt();
y = sc.nextInt();
if ((abs(x)+y<=4) && (y>=0)){
}
else{
}
}
}
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