#include <iostream>
using namespace std;
int main()
{
    string s;
    char n=' ';
    int c=0,i;
    getline(cin,s);
    for(i=0;i<=s.size();i++){
    	if(s[i]==n){
    		c++;
		}
	}
	for(i=1;i<=c;i++){
		cout<<" ";
	}
	for(i=0;i<=s.size();i++){
		if(s[i]!=n){
			cout<<s[i];
		}
	}
    return 0;
}
/**************************************************************
	Problem: 1102
	User: xuanhua
	Language: C++
	Result: Wrong Answer
****************************************************************/