active __ __ X Y Z mark __ X __ Y Z active __ X nil mark X active __ nil X mark X active U11 tt mark U12 tt active U12 tt mark tt active isNePal __ I __ P I mark U11 tt mark __ X1 X2 active __ mark X1 mark X2 mark nil active nil mark U11 X active U11 mark X mark tt active tt mark U12 X active U12 mark X mark isNePal X active isNePal mark X __ mark X1 X2 __ X1 X2 __ X1 mark X2 __ X1 X2 __ active X1 X2 __ X1 X2 __ X1 active X2 __ X1 X2 U11 mark X U11 X U11 active X U11 X U12 mark X U12 X U12 active X U12 X isNePal mark X isNePal X isNePal active X isNePal X active 1 __ 2 mark 1 nil 0 U11 1 tt 0 U12 1 isNePal 1 INNERMOST ./TRS/TRCSR/inn/PALINDROME_nosorts_noand_iGM.trs