#include <iostream>

using namespace std;

int main(void)
{
    string s, s1, s2;
    char c;

    while (cin >> c, c != ',') s += c;
    while (cin >> c, c != ',') s1 += c;
    while (cin >> c) s2 += c;

    int l = 0;
    while (l + s1.size() < s.size()) {
        if (s.substr(l, s1.size()) == s1) break;
        l++;
    }

    int r = s.size() - 1;
    while (r >= 0) {
        if (s.substr(r, s2.size()) == s2) break;
        r--;
    }

    if (l + s1.size() <= r) cout << r - l - s1.size() << endl;
    else cout << -1 << endl;

    // cout << s << endl;
    // cout << s1 << endl;
    // cout << s2 << endl;

    return 0;
}