void hanoi(int n,char a,char b,char c)
{
if(n==1)
  cout<<"(" <<a<<","<<b<<") ";
else
{
  hanoi(n-1,a,c,b );
  cout<<"("<<a<<","<<b<<" ) ";
  hanoi(n-1,c,b,a);
}
}
int main()
{
int n;
char a='a',b='b',c='c';
cin>>n;
hanoi(n,a,b,c);
return 0;
}