def search(s, s_len, len_max, num)
	return if len_max > s_len && len_max < @len_max
	if s_len == 0 && num > 1
		@len_max = [@len_max, len_max].max
		return
	end
	(1...s_len).each do |i|
		if s[0..i] == s[0..i].reverse
			len_max = [len_max, i + 1].max
			search(s[i + 1..-1], s_len - (i + 1), len_max, num + 1)
		end
	end
end

s = gets.strip
@len_max = 0
if s.length == 2
	puts '1'
else
	search(s, s.length, 0, 0)
	p @len_max
end