Except famous poets' poems that are evaluated as excellent, it is allowed to use the first two phrases including Makura word (Poetic epithet convention) or jokotoba (a preface word) of the original.
著名歌人の秀句と評される歌を除いて、枕詞・序詞を含む初2句を本歌をそのまま用いるのは許容される。