#include <bits/stdc++.h>
using namespace std;
int n, m, k;
bool debug = false;
int l[15][5] = {{0, 1, 2},         {3, 4, 5, 6},      {7, 8, 9, 10, 11},
                {12, 13, 14, 15},  {16, 17, 18},      {0, 3, 7},
                {1, 4, 8, 12},     {2, 5, 9, 13, 16}, {6, 10, 14, 17},
                {11, 15, 18},      {2, 6, 11},        {1, 5, 10, 15},
                {0, 4, 9, 14, 18}, {3, 8, 13, 17},    {7, 12, 16}};
int bl[1 << 19];
bool dd(int s) {
  if (s == 0) return false;
  if (__builtin_popcount(s) == 1) return true;
  if (bl[s] != 0) return bl[s] == 1;
  for (int i = 0; i < 15; i++) {
    int k = (i % 5 == 0 || i % 5 == 4) ? 3 : (i % 5 == 2 ? 5 : 4);
    for (int j = 0; j < k; j++) {
      for (int p = j; p < k; p++) {
        int q = j, ts = s;
        for (; q <= p; q++) {
          if (~s >> l[i][q] & 1)
            break;
          else
            ts -= 1 << l[i][q];
        }
        if (q > p) {
          if (!dd(ts)) {
            bl[s] = 1;
            return true;
          }
        }
      }
    }
  }
  bl[s] = 2;
  return false;
}
int main() {
  int s = 0;
  char x;
  for (int i = 0; i < 19;) {
    scanf("%c", &x);
    if (x == '.' || x == 'O') {
      if (x == 'O') s |= (1 << i);
      i++;
    }
  }
  puts(dd(s) ? "Karlsson" : "Lillebror");
  return 0;
}
