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