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#include <cstdio>
#include <vector>
using std::vector;

const int M = 1'001'013;

char buf[M];

vector<int> wczyt() {
  vector<int> x;
  scanf("%s", buf);
  for (int i = 0; buf[i]; i++) x.push_back(buf[i] - '0');
  return x;
}

int p[M], r[M];

int main() {
  vector<int> a = wczyt();
  vector<int> b = wczyt();
  vector<int> c = wczyt();
  int n = a.size();
  p[0] = 0;
  r[0] = 0;
  long long ret = 0;
  for (int i = 0; i < n; i++) {
    p[i+1] = r[i+1] = 0;
    if (a[i] + b[i] == c[i]) {
      p[i+1]++;
      p[i+1] += p[i];
    }
    if (a[i] + b[i] + 1 == c[i]) {
      r[i+1]++;
      r[i+1] += p[i];
    }
    if (a[i] + b[i] == c[i] + 10) {
      p[i+1] += r[i];
    }
    if (a[i] + b[i] + 1 == c[i] + 10) {
      r[i+1] += r[i];
    }
    ret += p[i+1];
  }
  printf("%lld\n", ret);
  return 0;
}