#include <bits/stdc++.h>
int x[100];
int main() {
  bool r = false, g = false;
  int n, m, k;
  std::cin >> n >> m >> k;
  if (m == 1) {
    std::cout << "Second\n";
    return 0;
  }
  for (int i = 0; i < n; ++i) {
    std::string s;
    std::cin >> s;
    int j1 = -1, j2 = -1;
    for (int j = 0; j < m; ++j)
      if (s[j] != '-') {
        if (j1 == -1)
          j1 = j;
        else
          j2 = j;
      }
    if (j1 == -1) continue;
    if (j2 == -1 || (s[j1] == s[j2] && m > 2)) {
      if (s[j1] == 'R')
        r = true;
      else
        g = true;
    } else {
      if (j2 != -1) {
        int t = j2 - 1 - j1;
        int z = 0;
        while (t) {
          x[z] = (x[z] + t % 2) % (k + 1);
          t /= 2;
          ++z;
        }
      }
    }
  }
  if (r && g) {
    std::cout << "Draw\n";
    return 0;
  } else if (r) {
    std::cout << "Second\n";
    return 0;
  } else if (g) {
    std::cout << "First\n";
    return 0;
  }
  if (*std::max_element(x, x + 100) == 0) {
    std::cout << "Second\n";
  } else {
    std::cout << "First\n";
  }
  return 0;
}
