//*************************************
//* ????1.cpp *
//* ??????1200012844 *
//* ?????2012?12?4? *
//* ???????????? *
//**************************************

int main()
{
	char str[100];
	cin.getline(str, 100);//??????
	char *p = str;//????????
	char delspace[100] = {0};
	int i = 0, j = 0; //i?????????j?????????
	while ( p[i] != '\0' )
	{
		if( p[i] == ' ' )//??????
			while( p[i + 1] == ' ' )
			{
				i++;
			}//???????????
		delspace[j++] = p[i++];//??????delspace?????????
	}
	cout << delspace << endl;
	return 0;
}