#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	getline(cin,s);
	for(int i=0;i<s.size();i++){
		if(s[i]==' '){
			cout<<" ";
		}
	}
	for(int i=0;i<s.size();i++){
		if(s[i]!=' '){
			cout<<s[i];
		}
	}
	return 0;
}

/**************************************************************
	Problem: 1102
	User: zzz
	Language: C++
	Result: Accepted
	Time:23 ms
	Memory:2076 kb
****************************************************************/