Python a, b = map(int, input().split()) lists = [] for _ in range(a): lists.append(input())#여기까지 입력 result1, result2 = 0, 0 for l in lists: if "X" not in l: result1 += 1#한 행씩 검사 for i in range(b):#한 열씩 검사하기 위해 for if "X" not in [lists[j][i] for j in range(a)]: result2 +=1 print(max(result1, result2))