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

struct Benri { Benri() { std::cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(12);}} benri;

using ll = long long;
using vi = vector<int>;
using vvi = vector<vi>;
using pii = pair<int, int>;
using vll = vector<long long>;
using vvll = vector<vll>;
using pll = pair<ll, ll>;
using ull = unsigned long long;

template <typename T> using PQ = priority_queue<T>;
template <typename T> using minPQ = priority_queue<T, vector<T>, greater<T>>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define F first
#define S second

template<class T>bool chmax(T &a, const T &b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b < a) { a = b; return 1; } return 0; }

constexpr long long MOD = 1000000007;
//constexpr long long MOD = 998244353;
//constexpr int INF = 1001001001;
constexpr ll INF = 1001001001001001001ll;
constexpr double EPS = 1e-10;
//using number = long long;


template< int64_t mod >
struct mInt {
    int64_t x;

    mInt() : x(0LL) {}
    mInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
    mInt &operator+=(const mInt &p) {
        if ((x += p.x) >= mod) x -= mod;
        return *this;
    }
    mInt &operator-=(const mInt &p) {
        if ((x += mod - p.x) >= mod) x -= mod;
        return *this;
    }
    mInt &operator*=(const mInt &p) {
        x = (x * p.x % mod);
        return *this;
    }
    mInt &operator/=(const mInt &p) {
        *this *= p.inverse();
        return *this;
    }
    mInt operator-() const { return mInt(-x); }
    mInt operator+(const mInt &p) const { return mInt(*this) += p; }
    mInt operator-(const mInt &p) const { return mInt(*this) -= p; }
    mInt operator*(const mInt &p) const { return mInt(*this) *= p; }
    mInt operator/(const mInt &p) const { return mInt(*this) /= p; }
    bool operator==(const mInt &p) const { return x == p.x; }
    bool operator!=(const mInt &p) const { return x != p.x; }
    mInt inverse() const {
        int64_t a = x, b = mod, u = 1, v = 0, t;
        while (b > 0) {
            t = a / b;
            swap(a -= t * b, b);
            swap(u -= t * v, v);
        }
        return mInt(u);
    }
    mInt pow(int64_t n) const {
        mInt ret(1), mul(x);
        while (n > 0) {
            if (n & 1) ret *= mul;
            mul *= mul;
            n >>= 1;
        }
        return ret;
    }
    friend ostream &operator<<(ostream &os, const mInt &p) {
        return os << p.x;
    }
    friend istream &operator>>(istream &is, mInt &a) {
        int64_t t;
        is >> t;
        a = mInt< mod >(t);
        return (is);
    }
    static int get_mod() { return mod; }
};

using mint = mInt< MOD >;

template< class T >
struct Matrix {
    vector< vector< T > > A;

    Matrix() {}
    Matrix(size_t n, size_t m) : A(n, vector< T >(m, 0)) {}
    Matrix(size_t n) : A(n, vector< T >(n, 0)) {};

    size_t height() const {
        return (A.size());
    }
    size_t width() const {
        return (A[0].size());
    }

    inline const vector< T > &operator[](int k) const {
        return (A.at(k));
    }
    inline vector< T > &operator[](int k) {
        return (A.at(k));
    }

    static Matrix I(size_t n) {
        Matrix mat(n);
        for (int i = 0; i < n; i++) mat[i][i] = 1;
        return (mat);
    }

    Matrix &operator+=(const Matrix &B) {
        size_t n = height(), m = width();
        assert(n == B.height() && m == B.width());
        for (int i = 0; i < n; i++)
            for (int j = 0; j < m; j++)
                (*this)[i][j] += B[i][j];
        return (*this);
    }
    Matrix &operator-=(const Matrix &B) {
        size_t n = height(), m = width();
        assert(n == B.height() && m == B.width());
        for (int i = 0; i < n; i++)
            for (int j = 0; j < m; j++)
                (*this)[i][j] -= B[i][j];
        return (*this);
    }
    Matrix &operator*=(const Matrix &B) {
        size_t n = height(), m = B.width(), p = width();
        assert(p == B.height());
        vector< vector< T > > C(n, vector< T >(m, 0));
        for (int i = 0; i < n; i++)
            for (int j = 0; j < m; j++)
                for (int k = 0; k < p; k++)
                    C[i][j] = (C[i][j] + (*this)[i][k] * B[k][j]);
        A.swap(C);
        return (*this);
    }
    Matrix &operator^=(long long k) {
        Matrix B = Matrix::I(height());
        while (k > 0) {
            if (k & 1) B *= *this;
            *this *= *this;
            k >>= 1LL;
        }
        A.swap(B.A);
        return (*this);
    }

    Matrix operator+(const Matrix &B) const {
        return (Matrix(*this) += B);
    }
    Matrix operator-(const Matrix &B) const {
        return (Matrix(*this) -= B);
    }
    Matrix operator*(const Matrix &B) const {
        return (Matrix(*this) *= B);
    }
    Matrix operator^(const long long k) const {
        return (Matrix(*this) ^= k);
    }

    friend ostream &operator<<(ostream &os, Matrix &p) {
        size_t n = p.height(), m = p.width();
        for (int i = 0; i < n; i++) {
            os << "[";
            for (int j = 0; j < m; j++) {
                os << p[i][j] << (j + 1 == m ? "]\n" : ",");
            }
        }
        return (os);
    }

};

int main() {
    ll N, K; cin >> N >> K;
    Matrix<mint> A(N);
    rep(i, N) rep(j, N) cin >> A[i][j];

    A ^= K;
    mint ans = 0;
    rep(i, N) rep(j, N) ans += A[i][j];

    cout << ans << endl;

}

Measured memory_bytes: 384