#include <stdio.h>
#define TRUE 1
#define FALSE 0
int main() {
  char c;
  int t;
  t = FALSE;
  while ((c = getchar()) != EOF) {
    if(c == ' ' || c == '\t'){
      if( t == TRUE) printf("\n");
      t=FALSE;
    }
    else if (c != '\n'){
      t = TRUE;
      putchar(c);
    }
    else { if(t != FALSE) {
      printf("\n");
      t = FALSE;
    }
    }
  }
}