 
 <prompt> Cindy nwere 20 marbul nke a na-eme 5 n'ime Lisa nwere. Ọ bụghị Cindy tinyere ya 12 marbul, ka anyị gbanwere marbul Lisa na-ewu? <response>: ```Lisa gara 20 - 5 = 15 marbles.
O nwere 8 marbles mgbe Cindy gafe 12 marbles, nke a gara 20 - 12 = 8 marbles.
O nwere 27 marbles a ga-eme Cindy gafe 12 marbles, nke a gara 15 + 12 = 27 marbles ahu ahu.
N'ihi na ya, Lisa nwere 19 marbles nweta Cindy.

Nke a bụ 19.``` 