#include <iostream>
#include <vector>
using namespace std;

int main()
{
int number;
int x=0,y=0;
int nr=0;
do
{
    if(x==y)
    x++;
    else
        if(x>y)
        y++;
    else
        x++;
    cout<<x<<" "<<y;
    cout.flush();

    cin>>number;
}while(!number);
}