Day 277:
April 3-Cywydd llosgyrnog, 8/8/7 8/8/7 syllables phrases a is in the middle of the 7 syllable line(#3,4 or 5) repeat ccb. For a sixtain. Xxxxxxxa  xxxxxxxa xxaxxxb  xxxxxxxc xxxxxxxc xxcxxxb.

Cywydd llosgyrnogs are great

Eight syllable lines have their mate
Close its’ fate with seven sounds.
 
aa then b, six lines  do well
cc then b, middle rhymes tell
Do it swell, then try more rounds.