#include <stdio.h>

int main()
{
 int c,p;
 c=getchar();
 while(c!=EOF){
    if(c!=' ')
    {
        p=0;
    }
    if(c==' ')
    {
        p++;
    }
    if(p<=1){
        putchar(c);
    }
    if(p==1){
        printf("\n");
    }
    c=getchar();
  }
}