#include <bits/stdc++.h>
using namespace std;
main(){
string s,a;
getline(cin,s);
cin>>a;
int dem=0; int z; long long res; char x,y;
x=a[0];y=a[1]; res=0;z=0;
for(int i=s.size()-2;i>=0;--i){
if(s[i+1]==y) z++;
if(s[i]==x) res+=z;
}
cout<<res;
}
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