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#include <iostream>
#include <vector>
#include <set>
#include <algorithm>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string one, two, three;
    cin >> one >> two >> three;
    long long n = one.size();

    vector<int> a(n), b(n), c(n), cat(n);

    for (size_t i = 0; i < n; i++) {
        a[i] = one[i] - '0';
        b[i] = two[i] - '0';
        c[i] = three[i] - '0';
        if (a[i] + b[i] == c[i]) {
            cat[i] = 1;
        } else if (a[i] + b[i] == c[i] + 10) {
            cat[i] = 2;
        } else if (a[i] + b[i] + 1 == c[i]) {
            cat[i] = 3;
        } else if (a[i] + b[i] + 1 == c[i] + 10) {
            cat[i] = 4;
        } else {
            cat[i] = 0;
        }
    }

    // cout << "Categories: ";
    // for (size_t i = 0; i < n; i++) {
    //     cout << cat[i] << " ";
    // }
    // cout << endl;
    // cout << "            ";

    long long result = 0;
    long long count = 0;
    int last = -1;
    bool block = false;
    for (size_t i = 0; i < n; i++) {
        if (cat[i] == 0) {
            result += (count + 1) * count / 2;
            count = 0;
            block = false;
        } else if (cat[i] == 1) {
            if (last == 3 || last == 4) {
                result += (count + 1) * count / 2;
                count = 0;
                block = false;
            }
            count++;
        } else if (cat[i] == 2) {
            if (last == 1 || last == 2) {
                result += (count + 1) * count / 2;
                count = 0;
                block = false;
            }
            if (last == 3 || last == 4) {
                if (block) {
                    count++;
                    block = false;
                }
            }
        } else if (cat[i] == 3) {
            if (last == 3 || last == 4) {
                result += (count + 1) * count / 2;
                count = 0;
            }
            block = true;
        } else if (cat[i] == 4) {
            if (last == 1 || last == 2) {
                result += (count + 1) * count / 2;
                count = 0;
                block = false;
            }
        }
        last = cat[i];
        // cout << result << " ";
    }
    result += (count + 1) * count / 2;

    cout << result;
}