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#include <bits/stdc++.h>
#define int LL
using namespace std;
#define PII pair<int, int>
#define VI vector<int>
#define VPII vector<PII>
#define LL long long
#define LD long double
#define f first
#define s second
#define MP make_pair
#define PB push_back
#define endl '\n'
#define ALL(c) (c).begin(), (c).end()
#define SIZ(c) (int)(c).size()
#define REP(i, n) for(int i = 0; i < (int)(n); ++i)
#define FOR(i, b, e) for(int i = (b); i <= (int)(e); ++i)
#define FORD(i, b, e) for(int i = (b); i >= (int)(e); --i)
#define ll LL
#define st f
#define nd s
#define pb PB
#define mp MP
#define eb emplace_back
#define siz(c) SIZ(c)
const int inf = 1e9+7;
const ll INF = 1e18L+7;

#define sim template<class n
sim, class s> ostream & operator << (ostream &p, pair<n, s> x)
{return p << "<" << x.f << ", " << x.s << ">";}
sim> auto operator << (ostream &p, n y) ->
typename enable_if<!is_same<n, string>::value, decltype(y.begin(), p)>::type 
{int o = 0; p << "{"; for(auto c: y) {if(o++) p << ", "; p << c;} return p << "}";}
void dor() {cerr << endl;}
sim, class...s> void dor(n p, s...y) {cerr << p << " "; dor(y...);}
sim, class s> void mini(n &p, s y) {if(p>y) p = y;}
sim, class s> void maxi(n &p, s y) {if(p<y) p = y;}
#ifdef DEB
#define debug(...) dor(__FUNCTION__, ":", __LINE__, ": ", __VA_ARGS__)
#else
#define debug(...)
#endif 

#define I(x) #x " =", (x), " "
#define A(a, i) #a "[" #i " =", i, "] =", a[i], " "

string mapp(string s) {
    for(auto &i: s) {
        if(i == '0')i = 'A';
        else i='P';
    }
    return s;
}

int longest_palindrome_substring(string s) {
    // check every segment
    int n = s.size();
    int res = 1;
    REP(i, n) {
        int l = i, r = i;
        while(l >= 0 && r < n && s[l] == s[r]) {
            maxi(res, r-l+1);
            l--;
            r++;
        }
        l = i, r = i+1;
        while(l >= 0 && r < n && s[l] == s[r]) {
            maxi(res, r-l+1);
            l--;
            r++;
        }
    }
    return res;
}

void solve(int n) {
    pair<int, string> res;
    res.f = 1e9;
    bool ok = 0;
    REP(i, 1 << n) {
        string s;
        REP(j, n) s += char('0' + ((i & (1 << j)) > 0));
        // debug(s, longest_palindrome_substring(s));
        int val = longest_palindrome_substring(s);
        // if(val == 4)debug(s);
        mini(res, make_pair(val, s));
    }
    cout << n << " : " << res << endl;

}

void brute(int n, int k) {
    REP(i, 1 << n) {
        string s;
        REP(j, n) s += char('0' + ((i & (1 << j)) > 0));
        int val = longest_palindrome_substring(s);
        if(val == k) {
            cout << mapp(s) << endl;
            return;
        }
    }
    cout << "NIE" << endl;
}

void generate(int n, int k) {
    string s(k, '0');
    while(s.size() < n) {
        s += "101100";
    }
    while(s.size() > n)s.pop_back();
    // assert(longest_palindrome_substring(s) == k);
    cout << mapp(s) << endl;
}

int32_t main() {
    // FOR(i, 1, 30) solve(i);

    int t;
    cin >> t;
    while(t--) {
        int n, k;
        cin >> n >> k;
        if(n <= 8)brute(n, k);
        else {
            if(k < 4) cout << "NIE" << endl;
            else generate(n, k);
        }
    }
}