题解

#include <bits/stdc++.h>
using namespace std;

int main(){
string s1,s2;
cin>>s1>>s2;
if(s1==s2){
cout<<s1;
}else{
if(s1>s2){
cout<<s2<<" "<<s1;
}else if(s1<s2){
cout<<s1<<" "<<s2;
}
}
return 0;
}