import std.algorithm;
import std.array;
import std.ascii;
import std.bigint;
import std.complex;
import std.container;
import std.conv;
import std.functional;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

auto readInts() {
        return array(map!(to!int)(readln().strip().split()));
}
auto readInt() {
        return readInts()[0];
}
auto readLongs() {
        return array(map!(to!long)(readln().strip().split()));
}
auto readLong() {
        return readLongs()[0];
}

void readlnTo(T...)(ref T t) {
    auto s = readln().split();
    assert(s.length == t.length);
    foreach(ref ti; t) {
        ti = s[0].to!(typeof(ti));
        s = s[1..$];
    }
}

const real eps = 1e-10;

bool isA(string s) {
    if(s[0..2] != ">'") {
        return false;
    }
    if(s[$-1] != '~') {
        return false;
    }
    auto m = s[2..$-1];
    if(m.length % 2 == 0) {
        return false;
    }
    if(m.length <= 1) {
        return false;
    }
    if(m[$/2] != '#') {
        return false;
    }
    if(m.count!(a => a != '=') != 1) {
        return false;
    }
    return true;
}

bool isB(string s) {
    if(s[0..2] != ">^") {
        return false;
    }
    if(s[$-2..$] != "~~") {
        return false;
    }
    auto m = s[2..$-2];
    if(m.length % 2 == 1) {
        return false;
    }
    if(m.empty()) {
        return false;
    }
    while(!m.empty()) {
        if(m[0..2] != "Q=") {
            return false;
        }
        m = m[2..$];
    }
    return true;
}

void main(){
    auto n = readLong();
    foreach(i; iota(n)) {
        auto s = readln().chomp();
        if(isA(s)) {
            writeln("A");
        } else if(isB(s)) {
            writeln("B");
        } else {
            writeln("NA");
        }
    }
}