#include <bits/stdc++.h>

using namespace std;

inline int read()
{
	int x=0;bool f=0;char ch=getchar();
	while(ch<'0' || ch>'9') {if(ch=='-') f=1;ch=getchar();}
	while(ch>='0' && ch<='9') x=(x<<3)+(x<<1)+(ch^48),ch=getchar();
	return f?-x:x;
}

#define x first
#define y second
#define pb push_back
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define per(i,a,b) for(int i=(a);i>=(b);i--)

typedef pair<int,int> PII;
typedef long long LL;
typedef unsigned long long ull;
const int N=1e6+10;

int n,top;
char str[N];

int main()
{
	int T=read();
	while(T--) {
		n=read(),top=0;
		scanf("%s",str+1);
		
		bool ans=1;
		for(int i=1;i<=n;i++) {
			if(str[i]=='R') ++top;
			else if(!top) ans=0;
			else top--;
		}
		if(top) ans=0;
		if(ans) puts("Bob");
		else puts("Alice");
	}
	
	return 0;
}