if else

#include <iostream>
using namespace std;
int main(){
    string a, b, c;
    cin >> a >> b >> c;
    if(a == "vertebrado")
    {
        if(b == "ave")
        {
            if(c == "carnivoro")
                cout << "aguia"<<endl;
            else 
                cout << "pomba"<<endl;
        }
        else
        {
            if(c == "onivoro")
                cout << "homem"<<endl;
            else
                cout << "vaca"<<endl;
        }
    }
    else
    {
        if(b == "inseto")
        {
            if(c == "hematofago")
                cout << "pulga"<<endl;
            else 
                cout << "lagarta"<<endl;
        }
        else
        {
            if(c == "hematofago")
                cout << "sanguessuga"<<endl;
            else
                cout << "minhoca"<<endl;
        }
    }
    return 0;
}