The rhyme scheme of Shakespeare' s sonnets is
AABBA CDDC EFFE GG.
BAABB CCDD EEFF GG.
CABCD ABCD ABCD GG.
DABAB CDCD EFEF GG.
AABBA CDDC EFFE GG.
BAABB CCDD EEFF GG.
CABCD ABCD ABCD GG.
DABAB CDCD EFEF GG.