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#include <bits/stdc++.h>
using namespace std;
#define ll long long

string a;
string b;
string c;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    
    cin >> a;
    cin >> b;
    cin >> c;
    
    int n = a.length();
    ll out=0;
    
    ll dp0=0;
    ll dp1=0;
    
    for (int i=n-1; i>=0; i--) {
        int s = (a[i]-'0') + (b[i]-'0') - (c[i]-'0');
        
        ll next_dp0=0;
        ll next_dp1=0;
        
        if (s == 0) {
            next_dp0 = dp0+1;
            next_dp1 = 0;
        } else if (s == 9) {
            next_dp0 = 0;
            next_dp1 = dp1;
        } else if (s == 10) {
            next_dp0 = 0;
            next_dp1 = dp0+1;
        } else if (s == -1) {
            next_dp0 = dp1;
            next_dp1 = 0;
        } else {
            next_dp0 = 0;
            next_dp1 = 0;
        }
        
        dp0 = next_dp0;
        dp1 = next_dp1;
        
        out += dp0;
    }
    
    cout << out << "\n";
    
    return 0;
}