bbbb bbdd bbeb bdii bebb bebe bebi bede bedi beeb beed bibb bibe bibi bide bidi bidx bieb bied bixi d-ix dddd ddie debe debi dedd dede dedi deeb deed deid deie dex- dexe dibb dibe dide didi dieb died diex diii dixi dxbe dxed dxii dxix dxxx ebed ebid ebix edde eddi ede- edei edex edie eede eeee eid- eide eidi eied eiei exed exid i-be ibed ibex ibid ibie idbe ided idee idex idid idie ieie iide iied iiie iiii ixxi x-ed xbee xexe xibe xidi xiii xixi xxii xxix xxxi xxxx