#include <stdio.h>
#define IN  1  // w slowie
#define OUT  0 // poza słowem

int main() {

    int c,state;

    state = OUT;

    while(c = getchar() != EOF) {

        if( c == ' ' || c == '\n' || c == '\t') {

        if(state == IN){

           putchar('\n'); // koniec slowa
           state = OUT;

        }

        } else if( state == OUT) {
        state = IN;
        putchar(c);
        } else

        putchar(c);

        }

        }
        }
    }
return 0;
}