#include<bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
typedef long long LL;
int main(){
    cout<<0<<" "<<0<<endl;
    LL a;
    cin>>a;
    if(a==0){
       return 0;
    }
    LL x=0;
    LL now=100002;
    REP(i,20){
        now/=2;
        cout<<0<<" "<<x+now<<endl;
        LL b;
        cin>>b;
        if(b==0)return 0;
        if(a>=b+now){
           a=b;
           x=x+now;
        }
    }
    LL y=0;
    now=100002;
    REP(i,20){
        now/=2;
        cout<<y+now<<" "<<x<<endl;
        LL b;
        cin>>b;
        if(b==0)return 0;
        if(a>=b+now){
           a=b;
           y=y+now;
        }
    }
	return(0);
}