d-ix dddd dfdt dfrf dfri dftr didi dif- diff diii din- dini dinn dint dird dirr dirt diti ditt dixi dnix dntt drif drin drit drix dttx dtxt dxdr dxfx dxif dxii dxix dxnd dxrd dxrf dxrr dxrt dxrx dxxr dxxx fdti ffff ffii ffrr fftf fidf fiff fifi fift fiii find fini finn fint firn fiti fitt fixt fixx fndd fndn fndr frid frin frit ftdi ftii fxdd idid idin idir idnx idrf ifid ifit ifni ifnr ifrf ifri iftn iiii iiit iitr iitt ind- indi infi inid init inni innr inri intd inti intn intr inxd iri- irid irin irix irri irtf irti itif itin itrf itri ittf ixxi n-ii ndfi ndnt ndrf ndri nfff nfix nidd nidi niff nift niir niit nind nini nirt nitf niti nitr nixi nixt nnit nnnn nntn nrrd ntnd nttr nxdn rfdi rfid ridd ridi ridx riff rift riif riin rind rinf rinn riri riti ritt rndf rnin rnnt rntd rrif rrrr rtdt rtnd tdff tdri tfin tidd tiff tift tiit tind tini tinn tint tird tiri tirr titi titt tixt tndd tndf trfd trfr tri- trif trin trit trix trtr ttff ttfn tttt txii txtr x-fi xdin xdxf xfin xidi xiii xixi xtnd xxii xxix xxxi xxxx