#include <bits/stdc++.h>

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;
        for(l=0;l + s1.size() <= s.size();l++)
        {
            int k = 0;
            while (k < s1.size())
            {
                if (s[l + k] != s1[k]) break;
                k ++ ;
            }
            if (k == s1.size()) break;
        }

        int r;
        for(r = s.size() - s2.size();r >= 0;r--)
        {
            int k = 0;
            while (k < s2.size())
            {
                if (s[r + k] != s2[k]) break;
                k ++ ;
            }
            if (k == s2.size()) break;
        }

        l += s1.size() - 1;

        if (l >= r) puts("-1");
        else printf("%d\n", r - l - 1);
    }
    return 0;
}