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#include <iostream>
using namespace std;

int main() 
{
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    pair<int, char> tab[] = {{3, 'a'}, {4, 'c'}, {5, 'g'}, {6, 'o'}};
    int n, sum = 0;
    char a;
    cin >> n;
    for(int i = 0; i < n; ++i)
    {
        sum = 0;
        for(int j = 0; j < 8; ++j)
        {
            cin >> a;
            sum += (a-48);
        }
        cout << tab[sum-3].second;
    }
}