#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(); }
}