def solve(N):
    if N == 1: return 2
    if N % 2 == 0:
        k = N // 2
        ans = 4
    else:
        k = (N - 1) // 2
        ans = 12

    for _ in range(0, k - 1):
        ans *= 5
        ans %= 1000000007

    return ans

if __name__ == '__main__':
    N = (int)(input())
    print(solve(N))