#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)
typedef long long ll;
typedef vector<int> vi;

typedef pair<int, int> pii;

int main()
{
	set<int> nouse;
	rep(a, 0, 9) rep(b, a + 1, 10)
	{
		vi n;
		rep(i, 0, 10)
		{
			if (i == a) continue;
			if (i == b) continue;
			n.push_back(i);
		}

		rep(i, 0, 4) cout << n[i];
		int x, y;
		cin >> x >> y;
		if (x == 4) return 0;
		rep(i, 0, 4) cout << n[i + 4];
		int xx, yy;
		cin >> xx >> yy;
		if (xx == 4) return 0;

		if (y + yy == 4)
		{
			nouse.insert(a);
			nouse.insert(b);
		}
	}

	vector<int> use;
	rep(i, 0, 10) if (nouse.find(i) == nouse.end()) use.push_back(i);

	rep(i, 0, 4) rep(j, 0, 4) rep(ii, 0, 4) rep(jj, 0, 4)
	{
		if (i == j) continue;
		if (i == ii) continue;
		if (i == jj) continue;
		if (j == ii) continue;
		if (j == jj) continue;
		if (ii == jj) continue;

		cout << use[i];
		cout << use[j];
		cout << use[ii];
		cout << use[jj];

		int x, y;
		cin >> x >> y;
		if (x == 4) return 0;
	}
}