#include <iostream>
#include <cstdio>

using namespace std;

int main()
{
    string s, s1, s2;
    char c;
    while(cin >> c, c != ',') s += c;
    while(cin >> c, c != ',') s1 += c;
    cin >> s2;

    int len = s.size(), len1 = s1.size(), len2 = s2.size();

    int idx = -1;
    for(int i = 0; i <= len - len1; i++)
    {
        int j = i, k = 0;
        while(s1[k] == s[j] && s[j]) k++, j++;

        if(k == len1) 
        {
            idx = i + k - 1;
            break;
        }
    }

    if(idx == -1) 
    {
        cout << "-1";
        return 0;
    }

    int idx2 = -1;
    for(int i = 0; i <= len - len2; i++)
    {
        int j = i, k = 0;
        while(s2[k] == s[j] && s[j]) k++, j++;

        if(k == len2) idx2 = i;
    }

    if(idx2 == -1 || idx >= idx2) 
    {
        cout << "-1";
        return 0;
    }

    cout << idx2 - idx - 1;

    return 0;
}