# include <iostream>
# define NR 205
using namespace std;
int val,i,I,J;
int ap[NR][NR];
int main()
{
      for(i=1; i<=200; ++i)
      {
            cout<<i<<" "<<i<<"\n"; ap[i][i]=1;
            cout.flush();
            cin>>val;
            if (val>=0) {
                if (val==0) return 0;

                for (I=i; I>=1; --I)
                    for (J=i; J>=1; --J) {
                        if (! ap[I][J]) {
                            cout<<I<<" "<<J<<"\n";
                            cout.flush();

                            cin>>val;
                            if (val==0) return 0;
                        }
                    }
            }
        }
    return 0;
}