错了不负责

#include<iostream>
#include<string>
using namespace std;
int main(){
string s1,s2;
cin>>s1>>s2;
if(s1<s2){
cout<<s1<<" "<<s2;
}else if(s1>s2){
cout<<s2<<" "<<s1;
}else{
cout<<s1;
}
return 0;
}