class Integer def divisor_list require 'prime' return [] if self <= 0 return [1] if self == 1 prime_division.map.with_index { |(base, k), i| s = i.zero? ? 0 : 1 (s..k).map { |n| base ** n } }.inject { |res, e| res + res.flat_map { |t| e.map { |v| t * v } } }.sort end end A, B = gets.split.map(&:to_i) res = A.divisor_list.count { |x| B % x == 0 } if res.even? puts 'Even' else puts 'Odd' end