#include <bits/stdc++.h>
using namespace std;

#define all(x) begin(x), end(x)
#ifdef CKISEKI
#define safe cerr << __PRETTY_FUNCTION__ << " line " << __LINE__ << " safe\n"
#define debug(a...) debug_(#a, a)
#define orange(a...) orange_(#a, a)
void debug_(auto s, auto ...a) {
  cerr << "\e[1;32m(" << s << ") = (";
  int f = 0;
  (..., (cerr << (f++ ? ", " : "") << a));
  cerr << ")\e[0m\n";
}
#include <experimental/iterator>
void orange_(auto s, auto L, auto R) {
  cerr << "\e[1;33m[ " << s << " ] = [ ";
  using namespace experimental;
  copy(L, R, make_ostream_joiner(cerr, ", "));
  cerr << " ]\e[0m\n";
}
#else
#define safe ((void)0)
#define debug(...) safe
#define orange(...) safe
#endif

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);

  vector<string> v, u;
  string s;
  while (cin >> s) {
    v.push_back(s);
    if (s.back() == ',' or s.back() == '.') {
      s = s.substr(0, s.size() - 1);
    }
    u.push_back(s);
  }

  map<string, vector<int>> after, before;
  set<string> vis_after, vis_before;
  for (size_t i = 0; i < v.size(); i++) {
    after[u[i]].push_back(i);
  }
  for (size_t i = 0; i + 1 < v.size(); i++) {
    before[u[i + 1]].push_back(i);
  }

  queue<pair<string, int>> q;

  for (size_t i = 0; i < v.size(); i++) {
    if (v[i].back() == ',') {
      if (!vis_after.count(u[i])) {
        vis_after.insert(u[i]);
        q.emplace(u[i], 0);
      }
      if (!vis_before.count(u[i + 1])) {
        vis_before.insert(u[i + 1]);
        q.emplace(u[i + 1], 1);
      }
    }
  }

  auto add_comma = [&](int i) {
    if (v[i].back() != ',' && v[i].back() != '.') {
      v[i] += ',';
      if (!vis_after.count(u[i])) {
        vis_after.insert(u[i]);
        q.emplace(u[i], 0);
      }
      if (!vis_before.count(u[i + 1])) {
        vis_before.insert(u[i + 1]);
        q.emplace(u[i + 1], 1);
      }
    }
  };

  while (!q.empty()) {
    auto [t, dir] = q.front(); q.pop();
    if (dir == 0) {
      for (int pos : after[t]) {
        add_comma(pos);
      }
    } else {
      for (int pos : before[t]) {
        add_comma(pos);
      }
    }
  }

  for (size_t i = 0; i < v.size(); i++) {
    cout << v[i] << (i+1==v.size() ? '\n' : ' ');
  }

  return 0;
}