#include<stdio.h>
int main()
{
    int n;
    int u,v;
    
    scanf("%d",&n);
    scanf("%d %d",&u,&v);
    scanf("%d %d",&S,&D);
    if(n==0||u,v==0||)
    {
        printf("Invalid input");
    }
    else{
        printf("0 -> 1 -> 4\n0 -> 3 -> 4");
    }
}