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> \boxXX= \hbox(0.0+0.0)x0.0 > \boxXX= \hbox(3.0+3.0)x100.0 .\glue -1.0 .\rule(3.0+3.0)x103.0 .\glue -2.0 > \boxXX= \hbox(3.0+3.0)x403.0 .\glue -1.0 .\rule(3.0+3.0)x203.0 .\glue -2.0 .\glue -1.0 .\rule(0.5+0.5)x104.0 .\glue -2.0 .\glue 102.0