Day 183:

Dec 30- Byr A Thoddaid, short toddaid, Any number of quatrains of 2 couplets.  Series of cyhydedd fer couplets, add toddaid byr to stanza for texture to poem with break in rhythm. Can be reversed beginning  quatrain with toddaid byr, ending with cyhydedd fer. Shorter line of toddaid byr end rhymes with main rhyme of stanza. This form makes use of the gair cyrch in which main rhyme appears somewhere near the end of longer line & end word is a 2ndary rhyme. 2ndary rhyme echoed by alliteration or assonance in 1st half of the next line. stanzaic, written in any number of quatrains made up of 2 couplets,syllabic, either L1-L2 8 syllables, L3 10 syllables L4 6 syllables, or the couplets are reversed L1 10 syllables, L2 6 syllables, L3-L4 8 syllables. rhymed, either AAbA with the main rhyme A occurring somewhere near the end of L3 and the secondary rhyme b echoed by alliteration or assonance in the first half of L4 or the couplets are reversed bAAA. So Technically the Byr A Toddaid is a short Cyhyded with a Toddaid. This version has 2 couplets, 2 lines with 8 syllables, then a 10 syllable with internal rhyme and ends with a 6 syllable line with internal rhyme. Xxxxxxxa, xxxxxxxa, xxxxxxbxxxc, xcxxxb. A modified Byr A Thoddaid will have the Syllable count: 10, 6, 8, 8, 10, 6.

A Byr A Thoddaid type phrase

Eight syllable couplet thus phased
With ten and six, the Celtic type of verse
Reverse, just take your pick.