#include <bits/stdc++.h>
using namespace std;
int k[5] = {3, 4, 5, 4, 3};
int st[5] = {0, 0, 0, 1, 2};
int dx[] = {0, -1, -1, 0, 1, 1};
int dy[] = {-1, -1, 0, 1, 1, 0};
int x[32], y[32];
int id[32][32];
char a[32][32];
char f[1 << 20];
int prep() {
  memset(id, 0xff, sizeof(id));
  int n = 0;
  for (int i = 0; i < (5); ++i)
    for (int j = 0; j < (k[i]); ++j)
      x[n] = i, y[n] = st[i] + j, id[i][st[i] + j] = n++;
  int res = 0;
  for (int i = 0; i < (5); ++i)
    for (int j = 0; j < (k[i]); ++j)
      if (a[i][st[i] + j] == 'O') res |= 1 << id[i][st[i] + j];
  return res;
}
int main() {
  for (int i = 0; i < (5); ++i) {
    gets(a[i]);
    for (int j = 0; j < (k[i]); ++j) a[i][st[i] + j] = a[i][2 * j + 5 - k[i]];
    a[i][st[i] + k[i]] = 0;
  }
  int need = prep();
  for (int m = 0; m < ((1 << 19)); ++m) {
    for (int i = 0; i < (19); ++i)
      if (m & (1 << i)) {
        for (int q = 0; q < (6); ++q) {
          int xx = x[i], yy = y[i], d = 1 << i;
          for (;;) {
            f[m] |= 1 - f[m ^ d];
            if (f[m]) goto end;
            xx += dx[q], yy += dy[q];
            if (xx < 0 || xx >= 5 || yy - st[xx] < 0 || yy - st[xx] >= k[xx] ||
                (~m & (1 << id[xx][yy])))
              break;
            d |= 1 << id[xx][yy];
          }
        }
      }
  end:;
  }
  if (f[need])
    puts("Karlsson");
  else
    puts("Lillebror");
  return 0;
}
