Allusion quotes in The doily in our stars chapters 1-4 and explain what the symbol alludes to

One two three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and four five and three four five and five of the one two three four five and four five and three four five