#include<bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin>>n;
for(int i=1;i<=n;i++)
{
int a,b,c,d,e,f,g,h;
cin>>a>>b>>c>>d>>e>>f>>g>>h;
if(a>e) cout<<"A";
else if(a<e) cout<<"B"<<endl;
else if(b>f) cout<<"A"<<endl;
else if(b<f) cout<<"B"<<endl;
else if(c>g) cout<<"A"<<endl;
else if(c<g) cout<<"B"<<endl;
else if(d>h) cout<<"A"<<endl;
else if(d<h) cout<<"B"<<endl;
}}