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(reverse=True)
count = 0
for i in range(num):
    count += sC[i]
ans = max(ans,count)

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(reverse=True)
    count = k
    for i in range(num//2):
        count += sC[i]
    ans = max(ans,count)
print(ans)