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

bool val(int r1,int r2){
    if (r1==0 || r1==10){
        if (r2==0 || r2==-1) return true;
    }
    if (r1==-1 || r1==9){
        if (r2==10 || r2==9) return true;
    }
    return false;
}

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

    string str1,str2,str3;
    cin>>str1>>str2>>str3;
    int n=str1.size();

    vector<int> s1(n),s2(n),s3(n);
    for (int i=0;i<n;i++){
        s1[i]=str1[i]-'0';
        s2[i]=str2[i]-'0';
        s3[i]=str3[i]-'0';
    }

    int l=0;
    vector<pair<int,int>> vp;

    while (l<n){
        int r=l;
        while (r+1<n && val(s1[r]+s2[r]-s3[r] , s1[r+1]+s2[r+1]-s3[r+1])) r++;
        vp.push_back({l,r});
        l=r+1;
    }

    long long ans=0;

    for (auto [f,s]:vp){
        int good=0;
        for (int i=f;i<=s;i++){
            if (s1[i]+s2[i]-s3[i]==0 || s1[i]+s2[i]-s3[i]==-1) good++; 
            if (s1[i]+s2[i]-s3[i]==0 || s1[i]+s2[i]-s3[i]==10) ans+=good;
        }
    }

    cout<<ans<<"\n";

    return 0;
}