#include<iostream> using namespace std; void hnt(int n,char a,char b,char c) { if(n==0) return ; hnt(n-1,a,c,b); printf("%c->%d->%c\n",a,n,b); hnt(n-1,c,b,a); } int main(){ int n; char a,b,c; cin>>n>>a>>b>>c; hnt(n,a,b,c); return 0; }