#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 7;
int toMask(vector<vector<bool>> vb) {
  int mask = 0, sh = 0;
  for (auto v : vb) {
    for (int i = 0; i < v.size(); i++) {
      mask += v[i] << (sh + i);
    }
    sh += v.size();
  }
  return mask;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  vector<vector<bool>> vb(5);
  for (int i = 0; i < 5; i++) {
    string s;
    getline(cin, s);
    for (char c : s) {
      if (c == '.')
        vb[i].push_back(0);
      else if (c == 'O')
        vb[i].push_back(1);
    }
  }
  vector<int> moves;
  for (int i = 0, sh = 0; i < 5; i++) {
    for (int j = 0; j < vb[i].size(); j++) {
      int m = 0;
      for (int j2 = j; j2 < vb[i].size(); j2++) {
        m += 1 << (sh + j2);
        moves.push_back(m);
      }
    }
    sh += vb[i].size();
  }
  vector<vector<int>> d1 = {{0, 3, 7},
                            {1, 4, 8, 12},
                            {2, 5, 9, 13, 16},
                            {6, 10, 14, 17},
                            {11, 15, 18}};
  vector<vector<int>> d2 = {{2, 6, 11},
                            {1, 5, 10, 15},
                            {0, 4, 9, 14, 18},
                            {3, 8, 13, 17},
                            {7, 12, 16}};
  for (auto v : d1) {
    for (int j = 0; j < v.size(); j++) {
      int m = 1 << v[j];
      for (int j2 = j + 1; j2 < v.size(); j2++) {
        m += 1 << v[j2];
        moves.push_back(m);
      }
    }
  }
  for (auto v : d2) {
    for (int j = 0; j < v.size(); j++) {
      int m = 1 << v[j];
      for (int j2 = j + 1; j2 < v.size(); j2++) {
        m += 1 << v[j2];
        moves.push_back(m);
      }
    }
  }
  vector<int> dp(1 << 19);
  for (int mask = 0; mask < (1 << 19); mask++) {
    for (int i : moves) {
      if ((i & mask) == i && !dp[mask ^ i]) {
        dp[mask] = 1;
        break;
      }
    }
  }
  cout << (dp[toMask(vb)] ? "Karlsson" : "Lillebror");
  return 0;
}
