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#include<bits/stdc++.h>

using namespace std;
using i64 = long long;
using i32 = int;

template<typename T> T load() { T x; cin >> x; return x; }
template<typename T> vector<T> loadN(int s) { vector<T> vt(s); for(auto& el : vt) el = load<T>(); return vt; }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& vt) { for(auto& el : vt) os << el << ' '; return os; }

struct Hash {
	Hash(i32 ival = 0):val(ival % MOD) {}
	Hash(i64 lval):val(lval % LMOD) {}
	static void tune(i32 val) { LMOD = MOD = val; }
	Hash operator+(const Hash& el) const { return { val + el.val}; }
	Hash operator*(const Hash& el) const { return { static_cast<i64>(val) * el.val}; }
	Hash& operator*=(const Hash& el)  { *this = *this * el; return *this; }
	Hash& operator+=(const Hash& el)  { *this = *this + el; return *this; }
	friend ostream& operator<<(ostream& os, const Hash& el ) {
		return os << el.val;
	}
	i32 val;
	static i64 LMOD;
	static i32 MOD;
};
i32 Hash::MOD = 1;
i64 Hash::LMOD = 1;

const vector<i32> BASES = {61, 67, 71, 73};
const vector<i32> MODULOS = {
	1000000007,
	1000000009,
	1000000021,
	1000000033,
};

i32 main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	Hash::tune(MODULOS[0]);
	auto size = load<i32>();
	char c;
	const auto diff = (i32)BASES.size();
	auto rev = vector<Hash>(diff);
	auto simple = vector<Hash>(diff);
	auto pows = vector<Hash>(diff, Hash{1});
	while(cin >> c) {
		c -= 'a';
		for(i32 curr = 0 ; curr < diff ; ++curr) {
			Hash::tune(MODULOS[curr]);
			auto base = BASES[curr];
			rev[curr] = rev[curr] * base + c;
			simple[curr] = simple[curr] + pows[curr] * c;
			pows[curr] *= base;
		}
	}
	for(i32 i = 0 ; i < diff ; ++i) {
		if(simple[i].val != rev[i].val) {
			cout << "NIE\n";
			return 0;
		}
	}
	cout << "TAK\n";
}