s/(?#
===VVCVC?= or
==?VVCVC?=
)((([aeiou]|(?<![aeiou])y(?![aeiou]))|(\B[aeiou]|(?<![aeiou])y(?![aeiou])))([aeiou]|(?<![aeiou])y(?![aeiou]))([^aeiouy .,'"\n()\[\]{}])(([aeiou]|(?<![aeiou])y(?![aeiou]))([^aeiouy .,]\B))|(?#
===VVC?== or
==?VVC?==
)(([aeiou]|(?<![aeiou])y(?![aeiou]))|(\B[aeiou]|(?<![aeiou])y(?![aeiou])))([aeiou]|(?<![aeiou])y(?![aeiou]))([^aeiouy .,]\B))|(?#
===CCVV===
)(([^aeiouy .,'"\n()\[\]{}])([^aeiouy .,'"\n()\[\]{}])([aeiou]|(?<![aeiou])y(?![aeiou]))([aeiou]|(?<![aeiou])y(?![aeiou])))/\3\6\5\9\8\11\14\13\16\18\17\19/gi