#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  vector<int> cnt(7, 0);
  const vector<string> colors = { "Red", "Orange", "Yellow", "Green", "Cyan", "Blue", "Violet" };
  auto f = [&](string s) {
    rep(i, 7) if (colors[i] == s) return i;
    assert(false);
  };
  rep(_, n) {
    string s;
    cin >> s;
    cnt[f(s)]++;
  }
  rep(_, n - 1) {
    string s;
    cin >> s;
    cnt[f(s)]--;
  }
  rep(i, 7) {
    if (cnt[i] > 0) cout << colors[i] << endl;
  }
  return 0;
}