-ic bbb bbc bbi bbn bbo bbx bcb bcc bci bcn bco bcx bi- bib bic bii bin bio bix bnb bnc bni bnn bno bnx bob boc boi bon boo box bxb bxi bxn bxo bxx c-- cbb cbc cbi cbn cbo cbx ccb ccc cci ccn cco ccx ci- cib cic cii cin cio cix cn- cnb cnc cni cnn cno cnx co- cob coc coi con coo cox cxc cxi cxo cxx ibb ibc ibi ibn ibo ibx icb icc ici icn ico iib iic iii iin iio iix in- inb inc ini inn ino inx io- iob ioc ioi ion ioo ixc ixi ixn n-i nbb nbc nbi nbn nbo nbx ncb ncc nci ncn nco ncx nib nic nii nin nio nix nnb nnc nni nnn nno no- nob noc noi non noo nox nxc o-i ob- obb obc obi obn obo obx oc- ocb occ oci ocn oco ocx oib oic oii oin oio on- onb onc oni onn ono onx oo- oob ooc ooi oon ooo oox ox- oxb oxc oxi oxn oxo oxx xbc xbx xcb xci xcx xic xii xin xio xix xnc xno xoc xoi xon xoo xox xxi xxo xxx