bbbb bbci bbeb bcbc bcbp bccc bcci bcec bcie bcpp bebb bebe bebi beci beeb beep beic bibb bibe bibi bicc bice bici bieb bipp bpcp cbbc cbcc cbce cbcp cbec cbee cbpc cbpp ccbc cccb cccc ccci cccp ccee ccic ccii ccip ccpe ccpp cebp cec- cece ceci cecp ceeb ceec ceip cepc cepe cepp cibc cibe cibi cicc cici ciee ciii cipp cpbc cpce cpeb cpep cpic ebbc ebcc ebic ecbc ecbe eccb eccc ecce ecci ecib ecip ecpp eeee eiec eiei epcc epci epec epee epi- epic epie epip eppc eppp i-be ibec ibie icbc icbp iccb iccc icci iccp icec icee icpc iecc ieie iiie iiii ipcc ipce ipec ipie ippc pbcc pcbc pccc pcce pcep pcip pcpb pcpp pece peci peec peep peip pepe pepi pibb pibi picc pice pici piep piip pipe pipi pipp ppcc ppci ppib ppic ppie pppp