题解

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