1*2dc4a881Sdholland# cases involving NULs 2*2dc4a881SdhollandaZb & a a 3*2dc4a881SdhollandaZb &p a 4*2dc4a881SdhollandaZb &p# (aZb) aZb 5*2dc4a881SdhollandaZ*b &p# (ab) ab 6*2dc4a881Sdhollanda.b &# (aZb) aZb 7*2dc4a881Sdhollanda.* &# (aZb)c aZb 8