#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

int query(string s){
    cout << s << endl;
    int x;
    cin >> x >> s;
    if(x == 10)exit(0);
    else return x;
}

int main(){
    string q(10, '0');
    rep(i, 10){
        int ma = -1, d = -1, x;
        rep(j, 10){
            q[i] = (char)('0' + j);
            x = query(q);
            if(x > ma){
                d = j;
                ma = x;
            }
        }
        q[i] = (char)('0' + d);
    }
}