re = /(?<![一-龠]{3})特許/m
str = '東京特許許可局
東京特許許諾
北海道特許許可局
神奈川特許許可局
さいたま特許許可局'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html