#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,d;
    cin>>a>>b;
    c=a-2*a+b;
    d=a-c;
    if((2*c+d!=b)||(c==0)){
        cout<<"Error";
        return 0;
    }
    cout<<c<<" "<<d;
    return 0;
}