#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e6 + 5;
const double EPS = 1e-6;
const long long INF = 1e9;
int st[MAXN];
int p[20];
vector<int> g;
int check(int a) {
  if (st[a]) return st[a];
  int b = 1 << 19;
  int sz = g.size();
  for (int i = 0; i < sz; i++) {
    if ((g[i] & a) == g[i]) {
      int ans = check(a ^ g[i]);
      st[a ^ g[i]] = ans;
      if (ans == 2) return 1;
    }
  }
  return 2;
}
int main() {
  char c;
  int a = 0;
  while (scanf("%1c", &c) == 1) {
    if (c == '.') {
      a *= 2;
    }
    if (c == 'O') {
      a *= 2;
      a++;
    }
  }
  p[0] = 1;
  for (int i = 1; i < 20; i++) p[i] = p[i - 1] * 2;
  g.push_back(p[0] + p[1] + p[2]);
  g.push_back(p[3] + p[4] + p[5] + p[6]);
  g.push_back(p[7] + p[8] + p[9] + p[10] + p[11]);
  g.push_back(p[12] + p[13] + p[14] + p[15]);
  g.push_back(p[16] + p[17] + p[18]);
  g.push_back(p[0] + p[3] + p[7]);
  g.push_back(p[1] + p[4] + p[8] + p[12]);
  g.push_back(p[2] + p[5] + p[9] + p[13] + p[16]);
  g.push_back(p[6] + p[10] + p[14] + p[17]);
  g.push_back(p[11] + p[15] + p[18]);
  g.push_back(p[7] + p[12] + p[16]);
  g.push_back(p[3] + p[8] + p[13] + p[17]);
  g.push_back(p[0] + p[4] + p[9] + p[14] + p[18]);
  g.push_back(p[1] + p[5] + p[10] + p[15]);
  g.push_back(p[2] + p[6] + p[11]);
  int sz = g.size();
  int b = 1 << 19;
  bool good;
  for (int i = 1; i < b; i++) {
    for (int j = 0; j < sz; j++) {
      good = true;
      if ((g[j] & i) == i) {
        bool was = false;
        bool was1 = false;
        for (int h = 0; h < 19; h++) {
          int f1 = g[j] & (1 << h);
          int f2 = i & (1 << h);
          if (f1 && f2) was1 = true;
          if (f1 != f2 && was1) {
            was = true;
          } else {
            if (f1 && f2 && was) {
              good = false;
              break;
            }
          }
        }
        if (good) {
          if (i != g[j]) g.push_back(i);
          break;
        }
      }
    }
  }
  st[0] = 2;
  sort(g.begin(), g.end());
  int ans = check(a);
  if (ans == 1)
    printf("Karlsson");
  else
    printf("Lillebror");
  return 0;
}
