int main()
{
  int a,b,c,d,e,n,k;
  scanf("%d",&n);
  if(n>9999)
  {
  a=n/10000;
  b=n%10000/1000;
  c=n%1000/100;
  d=n%100/10;
  e=n%10;
  k=10000*e+1000*d+100*c+10*b+a;
  }
  if((n>999)&&(n<10000))
  {
  b=n/1000;
  c=n%1000/100;
  d=n%100/10;
  e=n%10;
  k=1000*e+100*d+10*c+b;  
  }
  if((n>99)&&(n<1000))
  {
  c=n/100;
  d=n%100/10;
  e=n%10;
  k=100*e+10*d+c; 
  }
  if((n>9)&&(n<100))
  {
  d=n/10;     
  e=n%10/10;
  k=10*e+d;
  }      
  printf("%d\n",k); 
  return 0;
}
