#include <bits/stdc++.h>
using namespace std;
template <typename T>
void maxtt(T& t1, T t2) {
  t1 = max(t1, t2);
}
template <typename T>
void mintt(T& t1, T t2) {
  t1 = min(t1, t2);
}
bool debug = 0;
int n, m, k;
int dx[4] = {0, 1, 0, -1}, dy[4] = {1, 0, -1, 0};
string direc = "URDL";
long long ln, lk, lm;
void etp(bool f = 0) {
  puts(f ? "YES" : "NO");
  exit(0);
}
void addmod(int& x, int y, int mod = 998244353) {
  assert(y >= 0);
  x += y;
  if (x >= mod) x -= mod;
  assert(x >= 0 && x < mod);
}
void et(int x = -1) {
  printf("%d\n", x);
  exit(0);
}
long long fastPow(long long x, long long y, int mod = 998244353) {
  long long ans = 1;
  while (y > 0) {
    if (y & 1) ans = (x * ans) % mod;
    x = x * x % mod;
    y >>= 1;
  }
  return ans;
}
long long gcd1(long long x, long long y) { return y ? gcd1(y, x % y) : x; }
char s[100035];
long long dp[100035][11], ans;
int nxt(int i, int c) { return ((long long)i * (i - 1) / 2 + c + 10) % 11; }
void fmain(int tid) {
  scanf("%s", s + 1);
  n = strlen(s + 1);
  for (int(i) = 1; (i) <= (int)(n); (i)++) {
    for (int j = s[i] - '0' + 1; j <= 10; j++) {
      dp[i][nxt(j, s[i] - '0')] += dp[i - 1][j];
    }
    if (s[i] > '0') dp[i][s[i] - '0']++;
    for (int(j) = 0; (j) < (int)(11); (j)++) ans += dp[i][j];
  }
  printf("%lld\n", ans);
}
int main() {
  int t = 1;
  for (int(i) = 1; (i) <= (int)(t); (i)++) {
    fmain(i);
  }
  return 0;
}
