import bisect import copy import decimal import fractions import heapq import itertools import math import random import sys import time from collections import Counter,deque,defaultdict from functools import lru_cache,reduce from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max def _heappush_max(heap,item): heap.append(item) heapq._siftdown_max(heap, 0, len(heap)-1) def _heappushpop_max(heap, item): if heap and item < heap[0]: item, heap[0] = heap[0], item heapq._siftup_max(heap, 0) return item from math import gcd as GCD read=sys.stdin.read readline=sys.stdin.readline readlines=sys.stdin.readlines write=sys.stdout.write N=list(map(int,list(readline().rstrip()))) le=len(N) for mod in (10**9,10**9+7): ans=0 for i in range(1,le): ans+=9*pow(10,(i-1)//2,mod) ans%=mod if le>=2: dp=0 for n in N[:le//2]: dp*=10 dp+=n dp%=mod dp-=pow(10,le//2-1,mod) if le%2: dp*=10 dp%=mod ans+=dp ans%=mod if le%2: for i in range(1 if le==1 else 0,10): if N[:le//2]+[i]+N[:le//2][::-1]<=N: ans+=1 ans%=mod else: if N[:le//2]+N[:le//2][::-1]<=N: ans+=1 ans%=mod print(ans)