#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstdlib>
#include<iomanip>
#include<cstring>
#include<string>
#include<cmath>
#include<vector>
#include<queue>
#include<deque>
#include<set>
#include<map>
#include<utility>
#include<stack>

using namespace std;

int main(){
    int currencies;
    map<string, int> curcodes;
    long double rates[200];
    vector<pair<pair<int,int>,long double> > hrany;
    while (true)
    {
    bool lala=1;
    cin >> currencies;
    if (currencies == 0)
        break;
    for (int i = 0; i < currencies; i++)
    {
	string t;
	cin >> t;
	curcodes[t] = i;
    }
    for (int i = 0; i < currencies; i++)
    {
		rates[i] = 1;
    }
    int ratescount;
    cin >> ratescount;
    hrany.clear();
    hrany.resize(ratescount);
    for (int i = 0; i < ratescount; i++)
    {
	string from, to;
	cin >> from >> to;
	long double fromr, tor;
	scanf("%Lf:%Lf", &fromr, &tor);
	hrany[i] = make_pair(make_pair(curcodes[from],curcodes[to]),tor/fromr);
    }

    for (int i = 0; i<ratescount;i++){
	for (int j=0;j<ratescount;j++){
	    if (rates[hrany[j].first.second]<rates[hrany[j].first.first]*hrany[j].second)
		rates[hrany[j].first.second]=rates[hrany[j].first.first]*hrany[j].second;
	}
    }
    for (int i=0;i<ratescount && lala;i++){
	if (rates[hrany[i].first.second]<rates[hrany[i].first.first]*hrany[i].second){
	    cout<<"Arbitrage\n";
	    lala=0;
	}
    }
    if(lala) cout<<"Ok\n";

}

    return 0;
}