Put a letter in each circle so that each of the two-letter beginnings goes with each of the two-letter endings to produce 9 different four-letter words from left to right. Clues to the words in alphabetical order are given.

1.	2.	3.
sphere river side hit make full informer chips partner pause oaf drunkard	shelter walking stick mold hobble queue catalog buttocks ancient symbol oxidize	attic yearn knowledge inflatable vehicle called uncommon sieve carol beget

4.	5.	6.
mild swear pay attention hither draw liquid litigate certain clock sound bound bore	eat fleck buddy rendered leak beat passel gaffe ghetto	thrash enjoy cadence athlete jape shock bag interest sodium chloride

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The solutions are here.