题解

#include <bits/stdc++.h>
using namespace std;
int main(){
string s1,s2;
cin>>s1>>s2;
bool pd;
if(s1.size()!=s2.size()) pd=s1.size()<s2.size();
else pd=s1<s2;
if(pd==true) cout<<s1<<endl<<s2<<endl;
else cout<<s2<<endl<<s1<<endl;
return 0;
}