#include<bits/stdc++.h>
using namespace std;
void h(int x,char a,char b,char c)
{
	if(x==1)
	{
		cout<<a<<"->"<<x<<"->"<<b<<endl;
	}
	else
	{
		h(x-1,a,c,b);
		cout<<a<<"->"<<x<<"->"<<b<<endl;
		h(x-1,c,b,a);
	}
}
int main()
{
	int n;
	char a,b,c;
	cin>>n>>a>>b>>c;
	h(n,a,b,c);
	return 0;
}