# include <iostream.h>

void move (int n,int a,int b,int c)
{
   if (n==1)
     cout<<a<<" --> "<<c<<endl;
   else
     {
       move (n-1,a,c,b);
       cout<<a<<" --> "<<c<<endl;
       move (n-1,b,a,c);
     }
}