//******************
//**???????**
//*?? 1100012915**
//******11.29*******
//******************

int main() 
{ 
char start[200], result[200]; //????????
char *p = NULL ;			//????
int i = 0, j ;
cin.getline( start ,200);	//??????
for ( p = start; *p != '\0'; p ++ ) 
{ 
	if( ( *p != ' ') || ( *( p + 1 ) != ' ' ) )//????????????????????????
		cout << *p ;		//??
}
return 0;
}