c-cd cccc ccci ccdc ccdi ccdr ccic ccid ccii ccir ccrc ccri ccrt cctc cctt cd-r cddr cdic cdii cicc cici cicr cict cidc cidi cidr cidt ciid ciii ciit cikr circ ciri cirk cirr cirt citi citt ckck ckrc ckrd crcc crcr crdc cric crik crit crkc crrt crtc ctic ctrc dccc dcci dcct dcii dcrk dctc dddd ddrc dici dick dict didi diii diki dird dirk dirr dirt diti ditt dkdc dkid dric drit dtcc dtki iccc icci iccr icct icdc icdd icrc icrr icrt idcr idic idid idir idrc iicd iiii iiit iirc iitr iitt ikid ikki ikri ircc ircd irdc iri- iric irid irki irrc irri irti itic itri k-ci k-id kccc kccd kcci kcck kccr kcct kcdc kcdd kcdi kcdr kcic kcid kcii kcir kcit kckc kckk kckr kcrc kcri kcrr kcrt kctc kcti kdcc kdcd kdcr kddc kddd kddi kddk kddr kdic kdkd kdkk kdkr kdkt kdri kdtd kdti kdtr kicc kicd kick kicr kict kidd kidi kidk kidr kiic kiid kiii kiik kiit kikc kikd kiki kikk kikr kikt kirc kiri kirk kirr kirt kitc kiti kitr kitt kkcd kkci kkck kkcr kkct kkdc kkdd kkdt kkic kkid kkik kkit kkkk kkrc kkrk kkrr kkrt kktc kktk krcc krcd krci krdc krdd krdr krid krik krit krkc krkd krki krkk krkr krrc krri krrk krrr krrt krtc krti krtk krtr ktcc ktck ktcr ktdc ktdd ktdk ktdr ktic ktik ktkc ktkk ktkr ktkt ktrc ktri ktrk ktrr ktrt kttc ktti kttk kttr kttt rccc rcdc rcic rcid rcrd rctc rcti ricc rick rict ridc ridd ridi riki rikk riri riti ritt rrrr rtcc rtdt tccc tcdd tctc tdkr tdri ticc tick tidc tidd tiit tiki tird tiri tirr titc titi titt trcc tri- tric trik trit trtc trtr tttt