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							USING: compiler.utilities kernel tools.test ;
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							 | 
							
							
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							 | 
							
							{
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							    9
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							    H{ { 9 9 } { 44 9 } { 7 9 } }
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							 | 
							
							} [
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							    7 H{ { 7 44 } { 44 9 } { 9 9 } } [ compress-path ] keep
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							 | 
							
							] unit-test
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							 | 
							
							
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							 | 
							
							{ H{ { 3 H{ { 1 1 } { 2 2 } } } } } [
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							 | 
							
							    H{ } clone 1 3 pick conjoin-at 2 3 pick conjoin-at
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							 | 
							
							] unit-test
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