#include <bits/stdc++.h> using namespace std; #define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #define LL long long int #define pb push_back #define mp make_pair #define PII pair<int,int> #define PLL pair<LL,LL> #define PIS pair< int,string> #define VI vector <int>::iterator it; #define VL vector <LL>::iterator lt; #define VPI vector <PII>::iterator it; #define VPL vector <PLL>::iterator plt; #define test int t;cin>>t;while(t--) #define ff first #define ss second #define INF 1000000000 #define init(a,x) memset(a,x,sizeof(a)) #define input(a,n) for(i=0;i<n;i++)cin>>a[i]; #define output(a,n) for(i=1;i<=n;i++)cout<<a[i]<<" "; int main() { fast int n,m,i,j,k,z,x,y,sum=0,b,p,q,ans=0,h=0,l; bool f; string s; int a[26]; input(a,26); cin>>s; l=s.length(); for(i=0;i<l;i++) { h=max(h,a[s[i]-'a']); } cout<<l*h; return 0; }