n = int(input())
dp = [0]*10
dp[0] = 1
MOD = 10**9+7
for i in range(n):
    ndp = [0]*10
    v = 0
    for j in range(10):
        v += dp[j]
        ndp[j] += v
        ndp[j] %= MOD
    dp = ndp
print(sum(dp)%MOD)