
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cassert>
#include <iostream>
#include <cctype>
#include <sstream>
#include <string>
#include <list>
#include <vector>
#include <queue>
#include <set>
#include <stack>
#include <map>
#include <utility>
#include <numeric>
#include <algorithm>
#include <iterator>
#include <bitset>
#include <complex>
#include <fstream>
using namespace std;
typedef long long ll;
const double EPS = 1e-9;
typedef vector<int> vint;
typedef pair<int, int> pint;
#define rep(i, n) REP(i, 0, n)
#define ALL(v) v.begin(), v.end()
#define MSG(a) cout << #a << " " << a << endl;
#define REP(i, x, n) for(int i = x; i < n; i++)
template<class T> T RoundOff(T a){ return int(a+.5-(a<0)); }
template<class T, class C> void chmax(T& a, C b){ if(a < b) a = b; }
template<class T, class C> void chmin(T& a, C b){ if(b < a) a = b; }
template<class T, class C> pair<T, C> mp(T a, C b){ return make_pair(a, b); }

int main()
{
    int n;
	cin >> n;
	
	while(n--)
	{
		string snk;
		cin >> snk;
		
		if(snk.size() < 6 || snk.size() % 2 != 0 || (snk.substr(0, 2) != ">'" && snk.substr(0, 2) != ">^"))
		{
			cout << "NA" << endl;
		}
		else if(snk.substr(0, 2) == ">^")
		{
			if(snk.substr(2, 2) == "Q=" && snk.substr(snk.size() - 2, 2) == "~~")
			{
				for(int i = 4; i < snk.size() - 2; i += 2)
				{
					if(snk.substr(i, 2) != "Q=")
					{
						goto ng;
					}
				}
				
				cout << "B" << endl;
			}
			else
			{
			ng:;
				cout << "NA" << endl;
			}				
		}
		else
		{
			if(snk[(snk.size() - 3) / 2 + 2] == '#' && snk[snk.size() - 1] == '~')
			{
				rep(i, (snk.size() - 3) / 2)
				{
					if(snk[i + 2] != '=' || snk[i + 3 + (snk.size() - 3) / 2] != '=')
					{
						goto ng;
					}
				}
				
				cout << "A" << endl;
			}
			else
			{
				cout << "NA" << endl;
			}
		}
	}
}