#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define GETBIT(mask, i) ((mask) >> (i) & 1)
#define MASK(i) ((1LL) << (i))
#define SZ(x) ((int)(x).size())
#define CNTBIT(mask) __builtin_popcount(mask)
template<class X, class Y> bool maximize(X &x, Y y){ if (x < y) {x = y; return true;} return false;};
template<class X, class Y> bool minimize(X &x, Y y){ if (x > y) {x = y; return true;} return false;};
typedef pair<int, int> ii;
const int N = 2e5 + 5;
const int INF = 1e9 + 7;
int n, L;
ii a[N], b[N];
vector<ii> tmp;
vector<int> lef, rig;
set<ii> s;
int len = 0;
void read() {
    cin >> n >> L;
    len = 0;
    for(int i = 1; i <= n; i++) {
        cin >> a[i].first >> a[i].second;
        b[i] = a[i];
        if (a[i].fi != -1 && a[i].se != -1) len += a[i].se - a[i].fi + 1;
    }
}
bool check() {
    bool ok = 1;
    for(int i = 1; i <= n; i++) {
        if (a[i].first != -1 && a[i].second == -1) {
            a[i].second = a[i].first;
        }
        if (a[i].first == -1 && a[i].second != -1) {
            a[i].first = a[i].second;
        }
    }
    s.clear();
    for(int i = 1; i <= n; i++) {
        if (a[i].first != -1 && a[i].second != -1) {
            auto it = s.lower_bound(a[i]);
            if (it != s.end() && (*it).fi <= a[i].se) {
                //cerr << (*it).first << ' ' << (*it).second << endl;
                //cerr << a[i].fi << ' ' << a[i].se << endl;
                ok = 0;
                break;
            }
            s.insert(a[i]);
        }
    }
    return ok;
}
void solve() {
    if (check() == 0) {
        cout << "NIE\n";
        return;
    }
    swap(a, b);
    s.clear();
    tmp.clear();
    int cnt = 0;
    for(int i = 1; i <= n; i++) {
        if (a[i].first == -1 && a[i].second == -1) ++cnt;
        if (a[i].first != -1 && a[i].second != -1) {
            s.insert(a[i]);
        }
        if (a[i].first == -1 && a[i].second != -1) {
            tmp.push_back({a[i].second, 1});
        }
        if (a[i].first != -1 && a[i].second == -1) {
            tmp.push_back({a[i].first, 0});
        }
    }
    sort(ALL(tmp));
    lef.clear();
    rig.clear();
    for(int i = 0; i < SZ(tmp) - 1; i++) {
        int p = tmp[i].fi;
        if (tmp[i].se == 0 && tmp[i + 1].se == 1) {
            auto it = s.lower_bound({p, p});
            if ((*it).fi > tmp[i + 1].fi) {
                s.insert({p, tmp[i + 1].fi});
                ++i;
            }
            else {
                lef.push_back(tmp[i].fi);
            }
        }
        else {
            if (tmp[i].se == 0) lef.push_back(tmp[i].fi);
            else rig.push_back(tmp[i].fi);
        }
    }
    sort(ALL(lef), greater<int>());
    for(int p: lef) {
        auto it = s.lower_bound({p, p});
        if (it == s.end()) s.insert({p, L});
        else s.insert({p, (*it).fi - 1});
    }
    sort(ALL(rig));
    for(int p: rig) {
        auto it = s.lower_bound({p, p});
        if (it == s.begin()) s.insert({1, p});
        else {
            --it;
            s.insert({(*it).se + 1, p});
        }
    }
    int pre = 0, need = 0;
    for(auto it: s) {
        //cerr << it.fi << ' ' << it.se << endl;
        if (it.fi != pre + 1) ++need;
        pre = it.se;
    }
    if (pre != L) ++need;
    //cerr << need << ' ' << cnt << ' ' << len << endl;
    if (need <= cnt && cnt <= L - len) cout << "TAK";
    else cout << "NIE";
    cout << endl;
}
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen("long.inp", "r")) {
        freopen("long.inp", "r", stdin);
        freopen("long.out", "w", stdout);
    }
    int test = 1;
    cin >> test;
    while(test--) {
        read();
        solve();
        //cout << endl;
    }
    return 0;
}