#include<iostream>
#include<cstring>
using namespace std;
char x[100],y[100];
int main()
{
    cin>>x>>y;
    if(strlen(x)>strlen(y))
    {
        cout<<y<<endl;
         cout<<x;
    }
    else
    {
        cout<<x<<endl;
        cout<<y;
    }
}