ddd ddf ddi ddn ddr ddt ddx dfd dff dfi dfn dfr dft dfx di- did dif dii din dir dit dix dnd dnf dni dnn dnr dnt drd dri drn drr drt drx dtd dtf dti dtn dtr dtt dtx dxd dxi dxn dxr dxt dxx fdd fdf fdi fdn fdr fdt fdx ffd fff ffi ffn ffr fft ffx fid fif fii fin fir fit fix fnd fnf fni fnn fnr fnt fnx frd frf fri frn frr frt ftd ftf fti ftn ftr ftt ftx fxi fxr fxt fxx i-d i-f idd idf idi idn idr idt idx ifd iff ifi ifn ifr ift ifx iid iif iii iin iir iit iix in- ind inf ini inn inr int inx ir- ird irf iri irn irr irt irx itd itf iti itn itt itx ixi ixn n-i ndd ndf ndi ndn ndr ndt nfd nff nfi nfn nfr nft nid nif nii nin nir nit nix nnf nni nnn nnt nrd nrf nri nrn nrr nrt nrx ntd ntf nti ntn ntr ntt ntx nxd nxt rdd rdf rdi rdn rdr rdt rdx rfd rff rfi rfn rfr rft rid rif rii rin rir rit rix rnd rni rnn rnr rnt rrd rrf rri rrn rrr rrt rtd rtf rti rtn rtr rtt rtx rxr t-x tdd tdf tdi tdn tdr tdt tdx tfd tff tfi tfn tfr tft tfx tid tif tii tin tir tit tix tnd tnf tni tnn tnr tnt tnx trd trf tri trn trr trt trx ttd ttf tti ttn ttr ttt ttx txf txi txn txt xdf xdi xdr xdt xfn xft xfx xii xin xit xix xrd xrf xrt xrx xtf xti xtr xtx xxi xxx