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#include <bits/stdc++.h>
using namespace std;
#define pass (void)0
#define int long long


vector<char> make_abc(string num1, string num2, string num3){
    int n=num1.size();
    vector<char> abc;
    for(int i=0; i<n; i++){
        if((int)(num1[i])-'0' + (int)(num2[i])-'0' == (int)(num3[i])-'0'){
            abc.push_back('a');
        }
        else if((int)(num1[i])-'0' + (int)(num2[i])-'0' == (int)(num3[i])-'0'+10){
            abc.push_back('b');
        }
        else if((int)(num1[i])-'0' + (int)(num2[i])-'0' == (int)(num3[i])-'0'-1){
            abc.push_back('c');
        }
        else if((int)(num1[i])-'0' + (int)(num2[i])-'0' == (int)(num3[i])-'0'+9){
            abc.push_back('d');
        }
        else{
            abc.push_back('x');
        }
    }
    return abc;
}
vector<char> make_sek(vector<char> abc, int n){
    vector<char> sek;
    bool cis=false;
    for(int i=0; i<n; i++){
        if(abc[i]=='a'){
            if(cis){
                sek.push_back('x');
                cis=false;
            }
            sek.push_back('s');
        }
        else if(abc[i]=='x'){
            cis=false;
            sek.push_back('x');
        }
        else if(abc[i]=='b'){
            if(cis){
                cis=false;
                sek.push_back('s');
            }
            else{
                sek.push_back('x');
            }
        }
        else if(abc[i]=='c'){
            if(cis){
                sek.push_back('x');
            }
            cis=true;
        }
        else if(abc[i]=='d'){
            //if(cis==true){
            //    continue;
            //}
            if(cis==false){
                sek.push_back('x');
            }
        }
    }
    return sek;
}
signed main(){
//int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    string num1;
    string num2;
    string num3;
    cin >> num1 >> num2 >> num3;
    
    int n=num1.size();
    vector<char> abc=make_abc(num1, num2, num3);
    
    vector<char> sek = make_sek(abc, n);
    
    //for(int i=0; i<abc.size(); i++){
    //    cout << abc[i];
    //}
    //cout << "\n";
    //for(int i=0; i<sek.size(); i++){
    //    cout << sek[i];
    //}
    int count=0;
    long long res=0;
    sek.push_back('x');
    for(int i=0; i<sek.size(); i++){
        if(sek[i]=='s'){
            count++;
        }
        else{
            res += count*(count+1)/2;
            count=0;
        }
    }
    cout << res;
}