#include <iostream>
#include <map>
#include <string>
#include <set>


using namespace std;

typedef map<string, map<string, pair<int,int> > > silenost;


bool recu(silenost &theMap, const string &cur, set<string> used, string orig_cur, pair<int,int> ratio) {
    if (cur == orig_cur) {
	if (ratio.first==ratio.second) {
	    return false;
	} else {
	    return true;
	}
    }
    if (orig_cur == "") orig_cur = cur;
    
    if (used.find(cur) != used.end()) return false;
    used.insert(cur);
    
    bool ret = false;
    for (map<string, pair<int,int> >::iterator i = theMap[cur].begin(); i!=theMap[cur].end(); i++) {
	pair<int,int> rat2 = make_pair(ratio.first*i->second.first,ratio.second*i->second.second);
	if(recu(theMap, i->first, used, orig_cur, rat2)) ret = true;
    }
    
    return ret;
}

int main() {
    while (cin) {
	int curs;
	cin >> curs;
	if (curs == 0) break;
	for (int i = 0; i < curs; i++) {
	    string cur;
	    cin >> cur;
	}
	int lines;
	cin >> lines;
	silenost theMap;
	for (int i = 0; i < lines; i++) {
	    string cur1, cur2;
	    int rate1, rate2;
	    char t;
	    cin >> cur1 >> cur2 >> rate1 >> t >> rate2;
	    //cout << rate1 << " " << rate2 << endl;
	    theMap[cur1][cur2] = make_pair(rate1, rate2);
	}
	bool priznak = false;
	for (silenost::iterator i=theMap.begin(); i!=theMap.end(); i++) {
	    set<string> used;
	    //cout << i->first << endl;
	    if (recu(theMap, i->first, used, "", make_pair(1,1))) {
		cout << "Arbitrage" << endl;
		priznak = true;
		break;
	    } 
	}
	
	if (!priznak) cout << "Ok" << endl;
	
    }
    return 0;
}