自己看

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
string s,t;
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	std::cout.tie(nullptr);
	cin>>s>>t;
    ll len1=s.size();
    ll len2=t.size();
    if(len1>len2){
        cout<<t<<endl<<s<<endl;
    }else{
        if(len1<len2){
            cout<<s<<endl<<t<<endl;
        }else{
            cout<<min(s,t)<<endl<<max(s,t)<<endl;
        }
    }
	//fclose(stdin);
	//fclose(stdout);
	return 0;
}
//coder::by::M91