#include <cstring>
using namespace std;

const int MOD = 1000000007;

void matmul(int mat1[][2], int mat2[][2], int mat3[][2]) {
    int tmp[2][2] = {};
    for (int i = 0; i < 2; ++i) {
        for (int j = 0; j < 2; ++j) {
            for (int k = 0; k < 2; ++k) {
                tmp[i][j] = (tmp[i][j] + (long long)mat1[i][k] * mat2[k][j] % MOD + MOD) % MOD;
            }
        }
    }
    memcpy(mat3, tmp, sizeof(tmp));
}

class Chimney {
public:
    int countWays(long long n) {
        int mat[2][2] = { { 56, -64 }, { 8, -8 } };
        int res[2][2] = { { 24, 0 }, { 4, 0 } };
        --n;
        for (; n; n /= 2) {
            if (n % 2) matmul(mat, res, res);
            matmul(mat, mat, mat);
        }
        return res[0][0];
    }
};