#include <bits/stdc++.h>
using namespace std;
#define ll long long

vector<string> rott(vector<string> a) {
  vector<string> res(3, string(3, ' '));
  for (int i = 0; i < 3; ++ i) {
    for (int j = 0; j < 3; ++ j) {
      res[i][j] = a[2-j][i];
    }
  }

  return res;
}

ll check(vector<string> res) {
  if (res[0] == ":::" && res[1] == ":o:" && res[2] == ":::") return 1;
  if (res[0] == "::o" && res[1] == ":::" && res[2] == "o::") return 2;
  if (res[0] == "::o" && res[1] == ":o:" && res[2] == "o::") return 3;
  if (res[0] == "o:o" && res[1] == ":::" && res[2] == "o:o") return 4;
  if (res[0] == "o:o" && res[1] == ":o:" && res[2] == "o:o") return 5;
  if (res[0] == "o:o" && res[1] == "o:o" && res[2] == "o:o") return 6;
  return -1;
}

int main() {
  vector<string> a(3);
  ll res = -1;
  cin >> a[0];
  cin >> a[1];
  cin >> a[2];
  for (int i = 0; i < 5; ++ i) {
    res = max(res, check(a));
    vector<string> b = rott(a);
    //cout << b[0].size() << endl;
    a = b;
  }
  if (res != -1) cout << res;
  else cout << "unknown";
  cout << endl;

  return 0;
}