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def likes(names)
names = ['no one'] if names.empty?
res = [names[3] ? names[0..1].join(', ') : names.join(' and ')]
res.last.sub!(' and', ',') if names.size == 3
res << "and #{names.size - 2} others" if names[3]
res << "like#{'s' unless names[1]} this"
res.join(' ')
end
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