N=int(input())
A=list(map(int,input().split()))
B=list(map(str,input().split()))
A.sort()
a=0
b=0
c=0
for i in range(N):
  if B[i]=='add':
    a+=1
  elif B[i]=='max':
    b+=1
  else:
    c+=1
if a+b==0:
  print(0)
  exit()
if b+c==0:
  print(sum(A))
  exit()
C=A[:N-c]
ans=0
for x in C:
  ans+=x
if a==0:
  ans=C[-1]
else:
  for y in range(2,2+b):
    ans-=C[-y]
if c>0:
  ans=min(ans,A[N-c])
print(ans)