ip address

#include <iostream>
#include <vector>
#include <string>


using namespace std;

typedef long long ll;
typedef vector<ll> vll;

ll i, j;
string str;
vll dot, param;

string check()
{
    if (param.size() != 4) return "Bad";
    for (i = 0; i < 4; i++) if (dot[i + 1] - dot[i] == 1) return "Bad";
    for (i = 0; i < 4; i++) if (param[i] > 255) return "Bad";
    return "Good";
}

int main()
{
    getline(cin, str);
    dot.push_back(-1);
    for (i = 1; i < str.length() - 1; i++) if (str[i] == '.') dot.push_back(i);
    dot.push_back(str.length());
    if (dot.size() == 5)
    {
        for (i = 0; i < 4; i++)
        {
            param.push_back(0);
            for (j = dot[i] + 1; j < dot[i + 1]; j++) param[i] = param[i] * 10 + str[j] - 48;
        }
    }
    cout << check() << endl;
}