#include <stdio.h>

int main(){

	int a = getchar();
	int state = 0;

	while (a != EOF){

		if (state == 1){
			if (a != ' '){
				putchar (a);
			}
		} else {
			putchar(a);
		}

		if (a == ' '){
			state = 1;
		} else {
			state = 0;
		}

		a = getchar();

	}
	return 0;
}