#include <iostream>
using namespace std;
int main()
{
    string s, s1, s2;
    char c;
    while (cin >> c, c != ',') s += c;
    while (cin >> c, c != ',') s1 += c;
    while (cin >> c) s2 += c;
    if (s.size() < s1.size() || s.size() < s2.size()) puts("-1");
    else
    {
        int l = 0;
        while (l + s1.size() <= s.size())
        {
            int k = 0;
            while (k < s1.size())
            {
                if (s[l + k] != s1[k]) break;
                k ++ ;
            }
            if (k == s1.size()) break;
            l ++ ;
        }
        int r = s.size() - s2.size();
        while (r >= 0)
        {
            int k = 0;
            while (k < s2.size())
            {
                if (s[r + k] != s2[k]) break;
                k ++ ;
            }
            if (k == s2.size()) break;
            r -- ;
        }
        l += s1.size() - 1;
        if (l >= r) puts("-1");
        else printf("%d\n", r - l - 1);
    }
    return 0;
}