n, m = map(int, input().split())
a = []
for i in range(n):
    a.append(list(input()))
x = 0
for i in range(n-1):
    for j in range(m-1):
        b = []
        b.append(a[i][j])
        b.append(a[i+1][j])
        b.append(a[i][j+1])
        b.append(a[i+1][j+1])
        if 'f' in b and 'a' in b and 'c' in b and 'e' in b:
            x += 1
print(x)