#include<bits/stdc++.h>
using namespace std;
int main(){
    string s,a;
    getline(cin,s);
    for(int i=0;i<s.size();i++){
        if(s[i]==' '){
            a=a+s[i];
        }
    }
    cout<<a;
    for(int i=0;i<s.size();i++){
        if(s[i]!=' '){
            cout<<s[i];
        }
    }
    return 0;
}
/**************************************************************
	Problem: 1102
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:28 ms
	Memory:2076 kb
****************************************************************/