{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE BinaryLiterals #-}
{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE NumDecimals #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TupleSections #-}

import Control.Applicative
import Control.Arrow
import Control.Monad
import Control.Monad.ST

import Data.Char
import Data.List
import Data.Maybe

import qualified Data.ByteString.Char8 as B

import Data.Array.ST.Safe
import Data.STRef

import Debug.Trace
import Text.Printf

readInt = readLn :: IO Int
readInts = map ( fst . fromJust . B.readInt ) . B.words <$> B.getLine
readNInts = readInt >>= flip replicateM readInt

which a b f = if f then a else b
mp [ a, b ] = ( a, b )

main = readInt >>= print . solve

m = 1000000007

solve n = runST $ do
	dp <- newArray ( ( 0, 0 ), ( n, 10 ) ) 0 :: ST s ( STUArray s ( Int, Int ) Int )
	writeArray dp ( 0, 0 ) 1
	forM_ [ 0 .. n - 1 ] $ \i -> do
		forM_ [ 0 .. 9 ] $ \j -> do
			cur <- readArray dp ( i, j )
			forM_ [ j .. 9 ] $ \k -> do
				tar <- readArray dp ( i + 1, k )
				writeArray dp ( i + 1, k ) ( ( cur + tar ) `mod` m	)
	res <- newSTRef 0
	forM_ [ 0 .. 9 ] $ \j -> do
		val <- readArray dp ( n, j )
		modifySTRef res ( ( `mod` m ) . ( + val ) )
	readSTRef res