#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=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 cout<<r-l-1;
    }
    return 0;
}