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There are two groups of items. Match the items in group 1 with the items in group 2.

Group 1:
hallucinogens
ecstasy
stimulants
depressants
LSD
amphetamines

Group 2:
depress the nervous system, making the user sleepy and relaxed
stimulate the nervous system, making the user jittery and hyper-alert
over-use can create paranoia and hallucinations
creates an intense "trip"

alter the sensory perceptions of the user
creates a feeling of euphoria and warmth