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

int main(){
    constexpr unsigned long MOD = 1000000007, colors = (5 + MOD) >> 1;
    unsigned long N, M;
    cin >> N >> M;
    auto modpow = [&MOD](unsigned long a, unsigned long n, unsigned long r = 1){
        unsigned long ret{r};
        while(n){
            if(n & 1){
                ret *= a;
                ret %= MOD;
            }
            a *= a;
            a %= MOD;
            n >>= 1;
        }
        return ret;
    };
    vector<unsigned long> vec(N + 1);
    unsigned long coef{1};
    for(unsigned long i = 1; i <= N; ++i){
        coef *= colors - i + 1;
        coef %= MOD;
        coef *= modpow(i, MOD - 2);
        coef %= MOD;
        unsigned long C{0}, D{1};
        for(unsigned long j = 0; j < i; ++j){
            unsigned long tapi{modpow(i - j, N)};
            tapi *= D;
            tapi %= MOD;
            C += j & 1 ? MOD - tapi : tapi;
            D *= i - j;
            D %= MOD;
            D *= modpow(j + 1, MOD - 2);
            D %= MOD;
        }
        C %= MOD;
        vec[i] = C * coef % MOD;
    }
    long ans{0};
    for(unsigned long j = 0; j <= N; ++j){
        ans += modpow(colors - j, M, vec[j]) % MOD;
    }
    cout << ans % MOD << endl;
    return 0;
}