#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, k;
  cin >> n >> m >> k;
  string x[n];
  int cnt[10] = {0};
  bool f1 = 0, f2 = 0, z1 = 0, z2 = 0;
  for (int i = 0; i < n; i++) {
    cin >> x[i];
    int a = x[i].find('R'), b = x[i].find('G');
    if (x[i] == "GG")
      z1 = 1;
    else if (x[i] == "RR")
      z2 = 1;
    else if (a == -1 && b != -1)
      f1 = 1;
    else if (a != -1 && b == -1)
      f2 = 1;
    else {
      int tmp = abs(a - b) - 1;
      int idx = 0;
      while (tmp) {
        if (tmp % 2 == 1) cnt[idx]++;
        tmp /= 2;
        idx++;
      }
    }
  }
  if (m == 1 || z1 == 1)
    cout << "Second" << endl;
  else if (z2 == 1)
    cout << "First" << endl;
  else if (f1 == 1 && f2 == 1)
    cout << "Draw" << endl;
  else if (f1 == 1)
    cout << "First" << endl;
  else if (f2 == 1)
    cout << "Second" << endl;
  else {
    bool ans = 0;
    for (int i = 0; i < 10; i++) {
      if (cnt[i] % (k + 1) != 0) ans = 1;
    }
    if (ans == 1)
      cout << "First" << endl;
    else
      cout << "Second" << endl;
  }
  return 0;
}
