#include <cstdio>


void hanoi(int n, char ts, char ta,char td)
{
	if (n == 1)
	{
		printf ("%c -> %c\n", ts, td);
		return ;
	}

	else
	{

		hanoi(n-1, ts, td, ta);
		hanoi(1, ts, ta, td);
		hanoi(n-1, td, ta, ts);
	}
}

int main()
{
	FILE *f = fopen("ceva.txt", "r");
	int n;
	fscanf(f, "%d", &n);
	fclose(f);

	hanoi(n, 'a', 'c', 'b');

	return 0;
}