<Human>: crest 3d whitening strips professional effects individual [SEP] exp 03 25 individual treatment 2 strips crest 3d white whitestrips professional effects are formulated with the same enamel safe ingredient dentists use apply once a day for 30 minutes buy 20 pcs and get free crest pro health sensitive and gum toothpaste 24 gr application peel whitestrips from backing apply firmly to surface of teeth reveal your whiter smile <AI>: ["crest professional effect", "whitening strip teeth crest", "crest whitening strip", "whitening strip"] </s>