#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>

#define bufsize 100000

int main() {
  int inheaders = 1;
  char buf1[bufsize], buf2[bufsize];
  if (fgets (buf1, bufsize, stdin) == NULL)
    exit (0);
  if (fgets (buf2, bufsize, stdin) == NULL) {
    fputs (buf1, stdout);
    exit (0);
  }
  do {
    if (!strcmp (buf2, "\n"))
      inheaders = 0;
    else {
      if (isspace (buf2[0])) {
        assert (strlen (buf1) + strlen (buf2) + 1 < bufsize);
        strcpy (buf1+strlen(buf1)-1, buf2);
        buf2[0] = '\0';
      } else {
        fputs (buf1, stdout);
        strcpy (buf1, buf2);
      }
      if (fgets (buf2, bufsize, stdin) == NULL) {
        fputs (buf1, stdout);
        exit (0);
      }
    }
  } while (inheaders);
  fputs (buf1, stdout);
  fputs (buf2, stdout);
  while (fgets (buf1, bufsize, stdin))
    fputs (buf1, stdout);
  exit (0);
}