#include <iostream>
#include <string>
#include <cstdio>
using namespace std;
 
string vbString(int Number,string Character){
        string res="";
        for(int i=0;i<Number;i++) res+=Character;
        return res;
}
string checksnake(string s){
        string t;
        for(int i=1;i<60;i++){
                t=">\'"+vbString(i,"=")+"#"+vbString(i,"=")+"~";
                if(t==s) return "A";
        }
 
        for(int i=1;i<60;i++){
                t=">^"+vbString(i,"Q=")+"~~";
                if(t==s) return "B";
        }
       return "NA";
 
}
int main(){
        string s;
        int n;
        cin >> n;
        while(n--){
                cin >> s;
                cout << checksnake(s) << endl;
         }
}