a=[ ['x','x'*14] ]+$<.map(&:strip).join.chars.chunk{|e|e}.to_a+[ ['x','x'*14] ]
r=0
a.size.times{|i|
	if a[i][0]=='o'
		r=[r,a[i][1].size].max
	elsif a[i][1].size<n
		r=[r,(i==0 ? 0 :a[i-1][1].size)+n,(i==a.size-1 ? 0 :a[i+1][1].size)+n].max
	else
		r=[r,(i==0 ? 0 :a[i-1][1].size)+(i==a.size-1 ? 0 :a[i+1][1].size)+n].max
	end
}
p r