题解

#include<iostream>
#include<cstring>
using namespace std;
string a,b;
int main(){
    cin>>a>>b;
    if(a.size()<b.size())
    {
        cout<<a<<endl<<b;
    }
    else if(b.size()<a.size())
    {
        cout<<b<<endl<<a;
    }
    else 
    {
        if(a<b)
        {
            cout<<a<<endl<<b;
        }
        else
        {
            cout<<b<<endl<<a;
        }
    }
}