#include <bits/stdc++.h>

#define REP(i, n) for(int (i)=0;(i)<(n);(i)++)

using namespace std;

char patt[6][2][10] = {
    {"::::0::::","::::0::::"},
    {"::0:::0::","0:::::::0"},
    {"::0:0:0::","0:::0:::0"},
    {"0:0:::0:0","0:0:::0:0"},
    {"0:0:0:0:0","0:0:0:0:0"},
    {"000:::000","0:00:00:0"}
};

int main() {
    char kostka[9];
    REP(i, 9){
        scanf(" %c ", &(kostka[i]));
    }
    REP(i, 6){
        REP(j, 2){
            int good = true;
            REP(k, 9){
                if (patt[i][j][k] != kostka[k]) {
                    good = false;
                }
            }
            if (good){
                cout << i+1 << endl;
                return 0;
            }

        }
    }
    cout << "unknown" << endl;
}