#include <iostream>
using namespace std;
int main()
{
 
 string a,b;
 cin>>a>>b;
 if(a.at(2)>b.at(2))
 {
  cout<<a.at(2)<<a.at(1)<<a.at(0)<<endl;                   
 }
 
 if(a.at(2)<b.at(2))
 {
  cout<<b.at(2)<<b.at(1)<<b.at(0)<<endl;                   
 }
 
  if(a.at(2)==b.at(2))
 {
      if(a.at(1)>b.at(1))
      {
       cout<<a.at(2)<<a.at(1)<<a.at(0)<<endl;                   
      }       
      
      if(a.at(1)<b.at(1))
     {
      cout<<b.at(2)<<b.at(1)<<b.at(0)<<endl;                   
     }
     
     if(a.at(1)==b.at(1))
     {
      if(a.at(0)>b.at(0))
      {
       cout<<a.at(2)<<a.at(1)<<a.at(0)<<endl;                   
      }       
         
       if(a.at(0)<b.at(0))
     {
      cout<<b.at(2)<<b.at(1)<<b.at(0)<<endl;                   
     }  
     
     if(a.at(0)==b.at(0))
     { 
       cout<<b.at(2)<<b.at(1)<<b.at(0)<<endl;                   
     }                   
     }         
 }

   
return 0;}