#include<iostream>
#include<algorithm>

#include<string>
using namespace std;
int main()
{
    string s,a,b;
    char c;
    while(cin>>c,c!=',')s=s+c;
    while(cin>>c,c!=',')a=a+c;
    while(cin>>c)b+=c;
    int l=0;
    while(l+a.size()<=s.size())
    {
        int k=0;
        while(k<a.size())
        {
            if(a[k]!=s[l+k])break;
            k++;
        }
        if(k==a.size())break;
        l++;
    }
    int r=s.size()-b.size();
    while(r>=0)
    {
        int i=0;
        while(i<b.size())
        {
            if(b[i]!=s[r+i])break;
            i++;
        }
        if(i==b.size())break;
        r--;
    }
    l+=a.size()-1;
    if(l>=r)puts("-1");
    else cout<<r-l-1<<endl;

    return 0;
}