#include <iostream>
#include <cstring>
#include <stdio.h>
using namespace std;
string a,b,c;
int mn=100000, current=0;
bool r=false,f=true;
int main()
{
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    cin>>a>>b>>c;
    for(int i=0;i<c.length();i++){
        if(c[i]==a[0]&&r) current=0;
        if(c[i]==a[0]&&!r) r=true;
        if(r) current++;
        if(c[i]==b[0]&&r){ r=false, f=false;
        if(current<mn) mn=current; current=0; }
}
if(f) cout<<"There's no such sequence";
else cout<<mn-2;
    return 0;
}