active from X mark cons X from s X active length nil mark 0 active length cons X Y mark s length1 Y active length1 X mark length X mark from X active from mark X mark cons X1 X2 active cons mark X1 X2 mark s X active s mark X mark length X active length X mark nil active nil mark 0 active 0 mark length1 X active length1 X from mark X from X from active X from X cons mark X1 X2 cons X1 X2 cons X1 mark X2 cons X1 X2 cons active X1 X2 cons X1 X2 cons X1 active X2 cons X1 X2 s mark X s X s active X s X length mark X length X length active X length X length1 mark X length1 X length1 active X length1 X active 1 from 1 mark 1 cons 2 s 1 length 1 nil 0 0 0 length1 1 FULL ./TRS/TRCSR/Ex14_AEGL02_iGM.trs