c-cd cccc cccf ccci cccl ccdc ccdf ccdi ccfc ccfd ccff ccfi ccfl ccic ccid ccii ccil cclc ccli ccoc ccod cddl cdic cdii cdio cdli cfcf cfcl cfco cicc cici cico cidc cidi ciff cifl ciid ciii cili cill cilo clcd cldc clic clif clii clio clod clof cloo coco codd codi codl cofc coff cofi coif coil col- cold coli coll colo cood coof cool dccc dcci dccl dcfc dcii dcil dcio dcli dddd ddlc ddoc dfcc dfco dici dico didi dido dif- diff diii dilf dili dill dilo dioc diol dlco dlii dlil doci doco dod- dodd dodi dodo doff doid doil dold dolf doli doll dolo dood doof dool fccf fcic fcii fdic fdoc ffcc ffff ffii ficc fico fidc fidf fido fifc fiff fifi fifo fiii fiil fild fili fill filo flcl flic flid flii floc flod floo foci foco fofo foid foil folc fold foli foll folo food foof fool iccc iccf icci iccl icco icdc icdd icdl icll icoc icod iddo idfc idic idid idil idio idli idoc idol ifcd ifco ific ifid ifil iicd iiii iiio iioi iioo ilcd ilic ilio ill- illd illi illo iloc iloo ioci iod- iodd iodo iofc ioii ioio iolo ioof iooi iooo lccc lcdd lcfc ldcf ldci ldif lfcc lico lidl lido liff lifl lifo liii lili lill lilo lio- liod llcc lldc lllc llll lloc llod lloo locc loci loco lodi loff lofi loic loid loif lold loli loll lolo looc lood loof lool occc occi oclc odci oddd oddi odic odio odoo ofcl off- offc offo ofid oici oido oiii olcc olic olid olio olli ollo olof oodi ooff ooid oold oolo oooo