#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c,d; cin>>a>>b>>c>>d; if(a<b&&b<c&&c<d){ cout<<"Fish Rising"; }else if(a>b&&b>c&&c>d){ cout<<"Fish Diving"; }else if(a==b&&b==c&&c==d){ cout<<"Fish At Constant Depth"; }else{ cout<<"No Fish"; } return 0; }