#include <bits/stdc++.h>
using namespace std;
int kx[6] = {0, 1, 1, 1, 2, 3};
int ky[6] = {0, 3, 4, 5, 5, 5};
int dx[3][2] = {{0, 1}, {1, 0}, {1, 1}};
char s[15][15];
int h[(2 << 20)];
bool dfs() {
  int dex = 0;
  for (int i = 1; i <= 5; i++) {
    for (int j = kx[i]; j <= ky[i]; j++) {
      dex <<= 1;
      dex ^= (s[i][j] == 'O');
    }
  }
  int &det = h[dex];
  if (!det) {
    det = -1;
    for (int i = 1; i <= 5; i++)
      for (int j = kx[i]; j <= ky[i]; j++) {
        int tx = i, ty = j;
        for (int k = 0; det < 0 && k < 3; k++) {
          if (s[tx][ty] != 'O') continue;
          while (s[tx][ty] == 'O') {
            s[tx][ty] = '.';
            tx += dx[k][0], ty += dx[k][1];
            if (!dfs()) {
              det = 1;
              break;
            }
          }
          while (tx != i || ty != j) {
            tx -= dx[k][0], ty -= dx[k][1];
            s[tx][ty] = 'O';
          }
          s[tx][ty] = 'O';
        }
      }
  }
  return det > 0;
}
int main() {
  for (int i = 1; i <= 5; i++)
    for (int j = kx[i]; j <= ky[i]; j++) scanf(" %c", &s[i][j]);
  if (dfs())
    printf("Karlsson\n");
  else
    printf("Lillebror\n");
  return 0;
}
