题解

#include<iostream>
using namespace std;
int main(){
    string a,b;
    cin>>a>>b;
    if(a==b){
        cout<<a;
    }else if(a>b){
        cout<<b<<" "<<a;
    }else if(a<b){
        cout<<a<<" "<<b;
    }
    return 0;
}