#include<iostream>

using namespace std;

string s, s1, s2;

int main()

{

    char c;

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

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

    cin >> s2;

    if (s.size() < s1.size() || s.size() < s2.size())   puts("-1");

    else {

        int l = 0;

        while (l + s1.size() <= s.size()) {

            int k = 0;

            for ( ; k < s1.size(); k ++) {

                if (s[l + k] != s1[k])  break;

            }

            if (k == s1.size()) break;

            l ++;

        }

        int r = s.size() - s2.size();

        while (r >= 0) {

            int k = 0;

            for ( ; k < s2.size(); k ++) {

                if (s[r + k] != s2[k])  break;

            }

            if (k == s2.size()) break;

            r --;

        }

        l += s1.size() - 1;

        if (l >= r) puts("-1");

        else    printf("%d\n", r - l - 1);

    }

    return 0;

}