//***************************************************************************
//?????????????????                                        *
//????wayne                                                             *
//?????12.22                                                           *
//***************************************************************************
int main()
{
	char sentence[100];                           //?????????
	int i,len;                                    //??????
	cin.getline(sentence,100);                    //??????
	len=strlen(sentence);                         //??????
	for (i=0;i<=len-2;i++)                        //????
	{
		if (sentence[i]==' '&&sentence[i+1]==' ') //?????
			continue;                             //???
		else 
			cout<<sentence[i];                    //????
	}
	cout<<sentence[len-1]<<endl;                  //???????????
	return 0;
}