import sys
input = sys.stdin.readline

N,M=list(map(int,input().split()))

S=[input().strip() for i in range(N)]

ANS=0

for i in range(N):
    flag=1
    fflag=0
    for j in range(M):
        if S[i][j]=="o":
            fflag=1

            for k in range(N):
                if k==i:
                    continue

                if S[k][j]=="o":
                    flag=0

    if flag==1 and fflag==1:
        ANS+=1

print(ANS)