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Keyword	CPC	PCC	Volume	Length string	Score
nutritional sleep supplement	0.17	0.5	6337	28	17
best nutritional sleep supplement	0.89	0.9	8556	33	52
the best sleep supplement	0.63	0.9	2887	25	92
what is the best supplement for sleep	0.92	0.2	4736	37	65