What does it mean that English literature Spencer rhymes with ababbcbcc?

Look at your last rhyme, that is, what is the rhyme of the last word of each sentence. ABC is to distinguish different rhymes. For example, if the first sentence ends with meet, we define it as rhyme, and the second sentence ends with fat, which is also the end of /t/. We also classify it as rhyme. The third sentence ends with food, which is /d/ instead of /t/, so we classify it as B rhyme, and the fourth sentence ends with head, which is also B rhyme, and so on. . . You got it?