int main()
{
    int a=0;                                            //???? 
    int b=0;                                            //???? 
    int c=0;                                           //???? 
    int d=0;                                           //???? 
    int e=0;                                           //???? 
    int f=0;                                           //???? 
    int g=0;                                           //???? 
    cin>>a;                                            //??a?? 
    b=a/10000;                                         //??b?? 
    c=(a-10000*b)/1000;                               //??c?? 
    d=(a-10000*b-1000*c)/100;                        //??d?? 
    e=(a-10000*b-1000*c-100*d)/10;                   //??e?? 
    f=a-10000*b-1000*c-100*d-10*e;                   //??f?? 
    if(b!=0&c!=0&d!=0&e!=0&f!=0)                     //????????????? 
       g=f*10000+e*1000+d*100+c*10+b;
       if(b==0&c!=0&d!=0&e!=0&f!=0)
          g=f*1000+e*100+d*10+c;
          if(b==0&c==0&d!=0&e!=0&f!=0)
             g=f*100+e*10+d;
             if(b==0&c==0&d==0&e!=0&f!=0)
                g=f*10+e;
                if(b==0&c==0&d==0&e==0&f!=0)
                   g=e;
     cout<<g<<endl;
     return 0;
}    