#include <bits/stdc++.h>
using namespace std;

#define all(x) begin(x), end(x)
#ifdef CKISEKI
#define safe cerr << __PRETTY_FUNCTION__ << " line " << __LINE__ << " safe\n"
#define debug(a...) debug_(#a, a)
#define orange(a...) orange_(#a, a)
template <typename ...T>
void debug_(const char *s, T ...a) {
    cerr << "\e[1;32m(" << s << ") = (";
    int cnt = sizeof...(T);
    (..., (cerr << a << (--cnt ? ", " : ")\e[0m\n")));
}
template <typename I>
void orange_(const char *s, I L, I R) {
    cerr << "\e[1;32m[ " << s << " ] = [ ";
    for (int f = 0; L != R; ++L)
        cerr << (f++ ? ", " : "") << *L;
    cerr << " ]\e[0m\n";
}
#else
#define safe ((void)0)
#define debug(...) safe
#define orange(...) safe
#endif

constexpr int kInf = 1 << 30;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int t;
    cin >> t;
    while (t--) {
        int n, m;
        cin >> n >> m;
        vector<string> a(n);
        for (auto &ai : a)
            cin >> ai;
        auto d = vector(n, vector(m, kInf));
        d[0][0] = 0;
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < m; ++j) {
                if (i == 0 and j == 0)
                    continue;
                if (a[i][j] == '#')
                    continue;
                if (i) d[i][j] = min(d[i][j], d[i - 1][j] + 1);
                if (j) d[i][j] = min(d[i][j], d[i][j - 1] + 1);
            }
        }
        if (d[n - 1][m - 1] == kInf) {
            cout << "NIE\n";
            continue;
        }

        auto bad = [](char x, char y) {
            return (x == '@') ^ (y == 'T');
        };

        string ans;
        {
            int x = n - 1, y = m - 1;
            while (x != 0 or y != 0) {
                if (x and d[x][y] == d[x - 1][y] + 1) {
                    ans += "D";
                    --x;
                } else {
                    ans += "P";
                    --y;
                }
            }
        }
        reverse(ans.begin(), ans.end());
        string hori(n, 'N'), vert(m, 'N');
        int x = 0, y = 0;
        for (auto c : ans) {
            if (c == 'D') {
                x++;
                if (bad(a[x][y], vert[y])) {
                    hori[x] = 'T';
                }
            } else {
                y++;
                if (bad(a[x][y], hori[x])) {
                    vert[y] = 'T';
                }
            }
        }
        cout << "TAK\n";
        cout << hori << '\n';
        cout << vert << '\n';
        cout << ans << '\n';
    }
    return 0;
}