#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[k+l]!=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[k+r]!=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;
}