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#include <iostream>
#include <array>

constexpr size_t MAX_ARR = 1000000;
constexpr size_t LETTERS = 'z' - 'a' + 1;
constexpr unsigned long long MULT_ONE = 1103515245;

int main() {
    size_t n;
    std::cin >> n;

    std::array<char, MAX_ARR> basic;
    basic.fill(0);

    int counts[LETTERS][LETTERS] = {};

    unsigned long long hash0 = 0, hash1 = 0, mult1 = 1;

    char ch, prev;
    size_t i = 0;
    while (std::cin >> ch) {
        ch = ch - 'a';

        basic[i % MAX_ARR] ^= ch;

        if (i != 0) {
            counts[prev][ch]++;
        }
        prev = ch;

        hash0 *= MULT_ONE;
        hash0 += ch;

        hash1 += ch * mult1;
        mult1 *= MULT_ONE;

        ++i;
    }

    bool ok = hash0 == hash1;

    for (size_t j = 0, k = (i - 1) % MAX_ARR; j < k; ++j, --k) {
        ok &= basic[j] == basic[k];
    }

    if (i > MAX_ARR && i % MAX_ARR != 0) {
        for (size_t j = i % MAX_ARR, k = MAX_ARR - 1; j < k; ++j, --k) {
            ok &= basic[j] == basic[k];
        }
    }

    for (size_t j = 0; j + 1 < LETTERS; ++j) {
        for (size_t k = j + 1; k < LETTERS; ++k) {
            ok &= counts[j][k] == counts[k][j];
        }
    }

    std::cout << (ok ? "TAK" : "NIE") << "\n";
}