#include
#include
using namespace std;
int arr[1000001];
int main(void) {

int vari;

for (int x = 0; x < 1000000; x++) {
scanf("%d", &arr[x]);
if (arr[x] == 0) {
vari = x;
break;
}
}
for (int x = 0; x < vari; x++) {
if (arr[x + 1] == 0) {
break;
}
if (arr[x] > arr[x + 1]) {
printf("Bad");
return 0;
}
}
printf("Good");
return 0;
}