N = int(input())
mod = 10 ** 9 + 7
pre = [0] * 10
pre[0] = 1
for _ in range(N):
    dp = [0] * 10
    for i in range(10):
        for j in range(i, 10):
            dp[j] += pre[i]
            dp[j] %= mod
    dp, pre = pre, dp
print(sum(pre)%mod)