#include<stdio.h>
void move(int n,char a,char b,char c)
{
if(n==1)
{
printf("\t%c->%c\n",a,c);
}
else
{
move(n-1,a,c,b);
printf("\t%c->%c\n",a,c);
move(n-1,b,a,c);
}
}
main()
{
int n;
scanf("%d",&n);
move(n,'a','b','c');
}