#include <string>
#include <iostream>
#include <algorithm>
#include <iterator>
#include <locale>
using namespace std;

int main(){
	string input;

	//don't skip leading whitespaces
	cin.unsetf(ios::skipws);

	//read all characters while compressing whitespaces
	const locale& loc(cin.getloc());	//locale
	unique_copy(istream_iterator<char>(cin), istream_iterator<char>(), back_inserter(input),
				[=](char c1, char c2){
					return isspace(c1, loc) && isspace(c2, loc);
				});
	
	//process input
	//-here:write it to the standrad ouput
	cout << endl;
	return 0;
}