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ACROSS
1)  an edge between a sidewalk and a roadway consisting of a line of ____stones (usually forming part of a gutter)
2)  united states chemist who discovered deuterium (1893-1981)
3)  a payment or series of payments made by the lessee to an owner for use of some property, facility, equipment, or service
4)  french soldier and writer whose descriptions of sexual perversion gave rise to the term `sadism' (1740-1814)


DOWN
1)  an inferior dog or one of mixed breed
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  tear or be torn violently
4)  a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information

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