//???????
//??? 2010?11?17?
int main()//?????
{
char ch[100];//???????
int i,j;
cin.get(ch,100,'\n');//?????
for(i=0;i<=100;i++){//????
	if(ch[i]==' '&&ch[i+1]==' '){//?????????
		for(j=i;j<=100;j++){
			ch[j]=ch[j+1];}}//??????????????????
	else
		ch[i]=ch[i];//?????
	}
	cout<<ch<<endl;//?????????
return 0;
}
