N=int(input())
Mod=10**9+7

DP=[[0]*10 for _ in range(N+1)]
DP[1]=[1]*10

for k in range(2,N+1):
    D=DP[k]
    E=DP[k-1]

    s=0
    for x in range(10):
        D[x]=s=(s+E[x])%Mod

print(sum(DP[N])%Mod)