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import fileinput
def neigh(a, i, j):
return [
a[i-1][j-1], a[i-1][j], a[i-1][j+1],
a[i][j-1], a[i][j+1],
a[i+1][j-1], a[i+1][j], a[i+1][j+1],
].count('@')
with fileinput.input() as lines:
a = [
['.'] * 200,
*[['.'] + list(line.replace('\n', '.')) for line in lines],
['.'] * 200,
]
s = 0
rem = True
while rem:
rem = False
for i in range(1,len(a)-1):
for j in range(1,len(a[1])-1):
if a[i][j] == '@' and neigh(a, i, j) < 4:
s += 1
rem = True
a[i][j] = '.'
print(s)
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