#include <iostream>
using namespace std;
 
#define withRL
 
int main() {
	string s;
	getline(cin , s);
	int i, j = 0;
	bool ifspace = false;
	for(i = 0; i < s.length(); i++){
		if(s[i] == ' '){
			#ifdef withRL
			if(!ifspace){
			#else
			if(j && !ifspace){
			#endif
				ifspace = true;
				s[j] = s[i];
				j++;
			}
		}
		else{
			ifspace = false;
			s[j] = s[i];
			j++;
		}
	}
	s.erase(j);
	if(s.back() == ' ') s.pop_back();
	cout << s << endl;
}

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                                  Gagarin became    an international celebrity, and was                                           awarded many medals and titles, including Hero of the Soviet Union.