#include<iostream>
using namespace std;

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

    if(s.size() < s1.size() || s.size() < s2.size())
        puts("-1");
    else{
        int l1 = -1,l2 = -1;
        int len = s.size(), len1 = s1.size(), len2 = s2.size();
        for(int i = 0; i + len1 < len; ++i){
            int j = i, k = 0;
            while(k < len1 && s1[k] == s[j]){
                ++j;
                ++k;
            }
            if(k == len1){
                l1 = j;
                break;
            }
        }

        for(int i = 0; i + len2 <= len; ++i){
            int j = i, k = 0;
            while(k < len2 && s2[k] == s[j]){
                ++j;
                ++k;
            }
            if(k == len2 && l2 < i)
                l2 = i;

        }

        if(l2 - l1 < 0 || l2 < 0 || l1 < 0)
            puts("-1");
        else
            cout << l2 - l1 << endl;
    }

    return 0;
}