#include <stdio.h>

#define IN   1  /* inside a word */
#define OUT  0  /* outside a word */

int main(){
  int c, state;
  state = OUT;
  while ((c = getchar()) != EOF) {
    if (c == ' ' || c == '\n' || c == '\t'){
      state = OUT;
      putchar('\n');
    }
    else if (state == OUT) {
      state = IN;
      putchar(c);
    }
  }
  return 0;
}