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{A}{A,B,C,D,E}{A,B,C,D,E,F,G,H,I,J,K} {F}{G}{H}{I}{J}{K}{B,F,G}{C,H}{D,I,J}{E,K}{A,B,C,D,E,E,G,H,I,J,K} {K}{J}{I}{H}{G}{F}{B}{C}{D}{E}{A,B,C,D,E,F,G,H,I,J,K} {A}{F}{G}{H}{I}{J}{K}{B,F,G}{C,H}{D,I,J}{E,K}{A,B,C,D,E,F,G,H,I,J,K}
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H→I,H→J,J→K,IJK→L,L→H H→I,H→J,J→K,IJ→L,L→H H→I,H→J,J→K,IJ→L,J→K H→I,J→K,IJ→L,L→H,L→K
H→I,H→J,J→K,IJK→L,L→H H→I,H→J,J→K,IJ→L,L→H H→I,H→J,J→K,IJ→L,J→K H→I,J→K,IJ→L,L→H,L→K
SELECT*FROM R WHEREL<’2’ SELECTI,JFROM R WHEREI<’2’ SELECT I,J FROM R WHERE J <’2’ SELECT * FROM R WHERE ’5’<’2’
{A}{A,B,C,D,E}{A,B,C,D,E,F,G,H,I,J,K} {F}{G}{H}{I}{J}{K}{B,F,G}{C,H}{D,I,J}{E,K}{A,B,C,D,E,E,G,H,I,J,K} {K}{J}{I}{H}{G}{F}{B}{C}{D}{E}{A,B,C,D,E,F,G,H,I,J,K} {A}{F}{G}{H}{I}{J}{K}{B,F,G}{C,H}{D,I,J}{E,K}{A,B,C,D,E,F,G,H,I,J,K}
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