#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <vector>
using namespace std;

char *build_string(char **words, int numwords)
{
  int i, rvsize;
  char *rv;

  rvsize = (numwords == 0) ? 1 : numwords;
  for (i = 0; i < numwords; i++) {
    rvsize += strlen(words[i]);
  }
  rv = (char *) malloc(sizeof(char)*rvsize);

  strcpy(rv, "");
  for (i = 0; i < numwords; i++) {
    if (i > 0) strcat(rv, " ");
    strcat(rv, strdup(words[i]));
  }
  return rv;
}

main()
{
  string s;
  vector <string> v;
  char **words;
  char *rv;
  int i;

  while (cin >> s) v.push_back(s);
  words = (char **) malloc(sizeof(char) * v.size());
  for (i = 0; i < v.size(); i++) words[i] = strdup(v[i].c_str());
  rv = build_string(words, v.size());
  if (v.size() < 20) printf("%s\n", rv);
  exit(0);

}