#include <iostream>
using namespace std;
 
void TOH(int n, int a, int b, int c)
{
    if(n>0)
    {
        TOH(n-1,a,c,b);
        cout << "from " << a << " to " << c <<endl;
        TOH(n-1,b,a,c);
    }
}
int main() 
{
    TOH(6,1,2,3);
    return 0;
}