Define abacus? Write 200 words about abacus?

or:Define abacus? Write 200 words about abacus?or:Uh, no. Do your own homework. Do the search, learn, then put it in your own words.

or:Define abacus? Write 200 words about abacus?

or:Uh, no. Do your own homework. Do the search, learn, then put it in your own words.

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