func population_count(n) { n.as_bin.count('1') }
say "#{0..29 «**« 3 «call« population_count -> join(' ')}"
 
var numbers = 60.of { |i|
    [i, population_count(i)]
}
 
say "Evil:   #{numbers.grep{_[1] %% 2}.map{.first}.join(' ')}"
say "Odious: #{numbers.grep{_[1] &  1}.map{.first}.join(' ')}"