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#include <bits/stdc++.h>

using namespace std;
#define PB push_back
#define LL long long
#define int LL
#define FOR(i,a,b) for (int i = (a); i <= (b); i++)
#define FORD(i,a,b) for (int i = (a); i >= (b); i--)
#define REP(i,n) FOR(i,0,(int)(n)-1)
#define st first
#define nd second
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((int)(x).size())
#define VI vector<int>
#define PII pair<int,int>
#define LD long double

template<class C> void mini(C& a4, C b4) { a4 = min(a4, b4); }
template<class C> void maxi(C& a4, C b4) { a4 = max(a4, b4); }

template<class TH> void _dbg(const char *sdbg, TH h){cerr<<sdbg<<"="<<h<<"\n";}
template<class TH, class... TA> void _dbg(const char *sdbg, TH h, TA... a) {
  while(*sdbg!=',')cerr<<*sdbg++;
  cerr<<"="<<h<<","; _dbg(sdbg+1, a...);
}

template<class T> ostream &operator<<(ostream &os, vector<T> V){
  os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]";
} 

template<class L, class R> ostream &operator<<(ostream &os, pair<L,R> P) {
  return os << "(" << P.st << "," << P.nd << ")";
}


#ifdef LOCAL
#define debug(...) _dbg(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (__VA_ARGS__)
#define cerr if(0)cout
#endif

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    string a, b, c;
    cin >> a >> b >> c;
    int n = SZ(a);

    vector<VI> cnt(2, VI(n, 0));

    REP(j, n) {
        int da = a[j] - '0';
        int db = b[j] - '0';
        int dc = c[j] - '0';

        REP(ci, 2) {
            int sum = da + db + ci;
            if (sum % 10 == dc) {
                int co = sum / 10;
                int prev = 0;
                if (j > 0) prev = cnt[co][j-1];
                cnt[ci][j] = prev + (co == 0);
            }
        }
    }

    int ans = 0;
    REP(j, n) ans += cnt[0][j];
    cout << ans << "\n";
}