active zeros mark cons 0 zeros active U11 tt L mark U12 tt L active U12 tt L mark s length L active U21 tt IL M N mark U22 tt IL M N active U22 tt IL M N mark U23 tt IL M N active U23 tt IL M N mark cons N take M IL active length nil mark 0 active length cons N L mark U11 tt L active take 0 IL mark nil active take s M cons N IL mark U21 tt IL M N active cons X1 X2 cons active X1 X2 active U11 X1 X2 U11 active X1 X2 active U12 X1 X2 U12 active X1 X2 active s X s active X active length X length active X active U21 X1 X2 X3 X4 U21 active X1 X2 X3 X4 active U22 X1 X2 X3 X4 U22 active X1 X2 X3 X4 active U23 X1 X2 X3 X4 U23 active X1 X2 X3 X4 active take X1 X2 take active X1 X2 active take X1 X2 take X1 active X2 cons mark X1 X2 mark cons X1 X2 U11 mark X1 X2 mark U11 X1 X2 U12 mark X1 X2 mark U12 X1 X2 s mark X mark s X length mark X mark length X U21 mark X1 X2 X3 X4 mark U21 X1 X2 X3 X4 U22 mark X1 X2 X3 X4 mark U22 X1 X2 X3 X4 U23 mark X1 X2 X3 X4 mark U23 X1 X2 X3 X4 take mark X1 X2 mark take X1 X2 take X1 mark X2 mark take X1 X2 proper zeros ok zeros proper cons X1 X2 cons proper X1 proper X2 proper 0 ok 0 proper U11 X1 X2 U11 proper X1 proper X2 proper tt ok tt proper U12 X1 X2 U12 proper X1 proper X2 proper s X s proper X proper length X length proper X proper U21 X1 X2 X3 X4 U21 proper X1 proper X2 proper X3 proper X4 proper U22 X1 X2 X3 X4 U22 proper X1 proper X2 proper X3 proper X4 proper U23 X1 X2 X3 X4 U23 proper X1 proper X2 proper X3 proper X4 proper take X1 X2 take proper X1 proper X2 proper nil ok nil cons ok X1 ok X2 ok cons X1 X2 U11 ok X1 ok X2 ok U11 X1 X2 U12 ok X1 ok X2 ok U12 X1 X2 s ok X ok s X length ok X ok length X U21 ok X1 ok X2 ok X3 ok X4 ok U21 X1 X2 X3 X4 U22 ok X1 ok X2 ok X3 ok X4 ok U22 X1 X2 X3 X4 U23 ok X1 ok X2 ok X3 ok X4 ok U23 X1 X2 X3 X4 take ok X1 ok X2 ok take X1 X2 top mark X top proper X top ok X top active X active 1 zeros 0 mark 1 cons 2 0 0 U11 2 tt 0 U12 2 s 1 length 1 U21 4 U22 4 U23 4 take 2 nil 0 proper 1 ok 1 top 1 INNERMOST ./TRS/TRCSR/inn/OvConsOS_nosorts_noand_C.trs