#include <bits/stdc++.h>
using namespace std;

#define rep(i,a,b) for (int i=a; i<b; i++)
#define trav(a,b) for (auto a:b)
#define all(x) begin(x),end(x)
#define lld long long

void solve() {
	int n;
	cin>>n;
	string s;
	cin>>s;
	int cnt=0;
	rep(i,0,n){
		if(s[i]=='R')cnt++;
		else cnt--;
		if(cnt<0){
			cout<<"Alice\n";
			return;
		}
	}
	cout<<"Bob\n";
}

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tt = 1;
	cin >> tt;
	while (tt--) solve();
	return 0; 
}