#include <iostream>
#include <map>
#include <vector>
#include <string>
using namespace std;

typedef map<string, int> IndexTable;

struct Rate {
    int nom;
    int denom;
    Rate():
        nom(0), denom(0) {}
    Rate(int n, int d):
        nom(n), denom(d) {}
    bool valid() const
    {
        return nom && denom;
    }
    Rate reverse() const
    {
        return Rate(denom, nom);
    }
    bool sameAs(const Rate& r) const
    {
        return nom*r.denom == denom*r.nom;
    }
    friend istream& operator>>(istream& is, Rate& r)
    {
        char delim;
        return is >> r.nom >> delim >> r.denom;
    }
    friend ostream& operator<<(ostream& os, const Rate& r)
    {
        return os << r.nom << ":" << r.denom;
    }
    Rate operator*(const Rate& r) const
    {
        return Rate(nom*r.nom, denom*r.denom);
    }
};

typedef vector<Rate> XchgTable;

int main(int argc, char* argv[])
{
    int C;
    while (cin >> C) {
        if (!C) break;
        string str;
        
        IndexTable index;
        XchgTable table;
        table.resize(C*C, Rate());
        
        for (int i=0; i<C; i++) {
            cin >> str; 
            index[str] = i;
            table[i+i*C] = Rate(1, 1);
        }
        
        int R;
        cin >> R;
        for (int i=0; i<R; i++) {
            cin >> str;
            int iA = index[str];
            cin >> str;
            int iB = index[str];
            cin >> table[iB+iA*C];
        }
        
        for (int y=0; y<C; y++) {
            for (int x=0; x<C; x++) {
                const Rate& r1 = table[x+y*C];
                if (!r1.valid()) continue;
                for (int q=0; q<C; q++) {
                    const Rate& r2 = table[q+x*C];
                    if (!r2.valid()) continue;
                    Rate& rr = table[q+y*C];
                    Rate r3 = r1*r2;
                    
                    //cout << "("<<y<<","<<x<<") = " << r1 << endl;
                    //cout << "("<<x<<","<<q<<") = " << r2 << endl;
                    //cout << "r1*r2 = " << r3 << endl;
                    //cout << "("<<y<<","<<q<<") = " << rr << endl;
                    
                    if (y == q && rr.valid() && !rr.sameAs(r3)) {
                        cout << "Arbitrage" << endl;
                        goto skipout;
                    } else {
                        rr = r3;
                    }
                }
            }
        }
        cout << "Ok" << endl;
skipout:;
    }
    return 0;
}