h = {}
h_temp = io.read()
h_i = 65;
for token in string.gmatch(h_temp, "[^%s]+") do
   h[h_i] = tonumber(token)
   h_i = h_i + 1
end

word = io.read()
word = word:upper()
w= {}
max = 0

for i in string.gmatch(word, ".") do
  a = h[i:byte(1,1)]
  --print(a)
  if(a> max) then max = a end
end

print(max * word:len())