n,k = map(int,input().split())
S = [input() for i in range(2*n)]
C = [list(map(int,input().split())) for i in range(2*n)]

num = 0
for s in S:
    num += s.count("#")

ans = -10**20

sC = []
for c in C:
    for i in c:
        sC.append(i)
sC.sort()
ans = max(ans,sum(sC[-num:]))

if num%2 == 0:
    sC = []
    for c in C:
        for i in range(n):
            cal = c[i]+c[-i-1]
            sC.append(cal)
    sC.sort()
    ans = max(ans,sum(sC[-num//2:])+k)
print(ans)