use std::io;

const MOD: u64 = 1_000_000_007;

struct F {
    // i桁のjで始まるAscNumberはいくつあるか
    // 1 <= i <= 1000000
    // 1 <= j <= 9
    memo: Vec<Vec<Option<u64>>>,
}

impl F {
    fn new() -> Self {
        let mut memo = vec![vec![None; 10]; 1000001];
        for j in 1..10 {
            memo[1][j] = Some(1);
        }

        Self {
            memo,
        }
    }

    fn call(&mut self, i: usize, j: usize) -> u64 {
        debug_assert!(1 <= i && i <= 1000000);
        debug_assert!(1 <= j && j <= 9);

        if let Some(res) = self.memo[i][j] { return res; }

        let mut res = 0;
        for j2 in j..10 {
            res += self.call(i-1, j2);
            res %= MOD;
        }

        self.memo[i][j] = Some(res);
        res
    }
}

fn main() {
    let mut s = String::new();
    io::stdin().read_line(&mut s).unwrap();
    let n: usize = s.trim().parse().unwrap();

    let mut f = F::new();
    let mut ans = 1;  // 0 もAscNumber
    for i in 1..n+1 { for j in 1..10 {
        ans += f.call(i,j);
        ans %= MOD;
    }}

    println!("{}", ans);
}