#include <iostream>
#include <algorithm>
#include <vector>
#include <string.h>
#include <assert.h>
using namespace std;
#define mod (long)(1e9 + 7)
#define all(x) (x).begin(), (x).end()
#define bitcount(n) __builtin_popcountl(long(n))
#define fcout cout << fixed << setprecision(15)
#define highest(x) (63 - __builtin_clzl(x))
#define long long long
template<class T> inline void YES(T condition){ if(condition) cout << "YES" << endl; else cout << "NO" << endl; }
template<class T> inline void Yes(T condition){ if(condition) cout << "Yes" << endl; else cout << "No" << endl; }
template<class T> inline void POSS(T condition){ if(condition) cout << "POSSIBLE" << endl; else cout << "IMPOSSIBLE" << endl; }
template<class T> inline void Poss(T condition){ if(condition) cout << "Possible" << endl; else cout << "Impossible" << endl; }
template<class T> inline void First(T condition){ if(condition) cout << "First" << endl; else cout << "Second" << endl; }
template<class T = string, class U = char>int character_count(T text, U character){ int ans = 0; for(U i: text){ ans += (i == character); } return ans; }
long power(long base, long exponent, long module){ if(exponent % 2){ return power(base, exponent - 1, module) * base % module; }else if(exponent){ long root_ans = power(base, exponent / 2, module); return root_ans * root_ans % module; }else{ return 1; }}
struct position{ int y, x; }; position move_pattern[4] = {{-1, 0}, {0, 1}, {1, 0}, {0, -1}}; // double euclidean(position first, position second){ return sqrt((second.x - first.x) * (second.x - first.x) + (second.y - first.y) * (second.y - first.y)); }
template<class T, class U> string to_string(pair<T, U> x){ return to_string(x.first) + "," + to_string(x.second); }
template<class itr> void array_output(itr start, itr goal){ string ans; for(auto i = start; i != goal; i++){ ans += to_string(*i) + " "; } ans.pop_back(); cout << ans << endl; }
template<class itr> void cins(itr start, itr goal){ for(auto i = start; i != goal; i++){ cin >> (*i); } }
template<class T> T gcd(T a, T b){ if(a && b){ return gcd(min(a, b), max(a, b) % min(a, b)); }else{ return a; }} template<class T> T lcm(T a, T b){ return a / gcd(a, b) * b; }
struct combination{ vector<long> fact, inv; combination(int sz) : fact(sz + 1), inv(sz + 1){ fact[0] = 1; for(int i = 1; i <= sz; i++){ fact[i] = fact[i - 1] * i % mod; } inv[sz] = power(fact[sz], mod - 2, mod); for(int i = sz - 1; i >= 0; i--){ inv[i] = inv[i + 1] * (i + 1) % mod; } } long C(int p, int q) const{ if(q < 0 || p < q) return 0; return (fact[p] * inv[q] % mod * inv[p - q] % 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%=(long k)
    {
        size_t n = height(), m = width();
        for(int i = 0; i < n; i++)
            for(int j = 0; j < m; j++)
                (*this)[i][j] %= k;
        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]) % mod) % mod;
        A.swap(C);
        return (*this);
    }
    
    Matrix &operator^=(long k)
    {
        Matrix B = Matrix::I(height());
        while(k > 0) {
            if(k & 1){
                B *= *this;
                B %= mod;
            }
            *this *= *this;
            *this %= mod;
            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 long k) const
    {
        return (Matrix(*this) %= k);
    }
    
    Matrix operator*(const Matrix &B) const
    {
        return (Matrix(*this) *= B);
    }
    
    Matrix operator^(const 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);
    }
    
    
    T determinant()
    {
        Matrix B(*this);
        assert(width() == height());
        T ret = 1;
        for(int i = 0; i < width(); i++) {
            int idx = -1;
            for(int j = i; j < width(); j++) {
                if(B[j][i] != 0) idx = j;
            }
            if(idx == -1) return (0);
            if(i != idx) {
                ret *= -1;
                swap(B[i], B[idx]);
            }
            ret *= B[i][i];
            T vv = B[i][i];
            for(int j = 0; j < width(); j++) {
                B[i][j] /= vv;
            }
            for(int j = i + 1; j < width(); j++) {
                T a = B[j][i];
                for(int k = 0; k < width(); k++) {
                    B[j][k] -= B[i][k] * a;
                }
            }
        }
        return (ret);
    }
};

int main(){
    int N;
    long K;
    cin >> N >> K;
    Matrix<long> A(N);
    for(int i = 0; i < N; i++){
        cins(all(A.A[i]));
    }
    auto pathes = A ^ K;
    long ans = 0;
    for(int i = 0; i < N; i++){
        for(int j = 0; j < N; j++){
            ans += pathes.A[i][j];
            ans %= mod;
        }
    }
    cout << ans % mod << endl;
}


Measured memory_bytes: 384