n = int(input())
f = False
if(n % 2 == 0):
    f = True
else:
    f = False

ans = 0
if(n == 1):
    print(2)
elif(n == 2):
    print(4)
elif(n == 3):
    print(12)
else:
    if(f):
        ans = (pow(5,n // 2 - 2,1000000007) * 4 * 5) % 1000000007
    else:
        ans = (pow(5,n // 2 - 1,1000000007) * 4 * 3) % 1000000007
    print(ans)