oob ooc ooi ook oom oon ooo oot oox ot- ota otb otc ote oti otk otm otn oto ott ox- oxa oxb oxc oxi oxn oxo oxt oxx t-x taa tab tac tae tai tak tam tan tao tat tax tba tbb tbc tbe tbi tbk tbm tbn tbo tbt tca tcb tcc tce tci tck tcm tcn tco tct tcx te- tea teb tec tee tei tek tem ten teo tet tex tia tib tic tie tii tik tim tin tio tit tix tka tkb tkc tke tkk tkm tko tkt tma tmb tmc tme tmi tmk tmm tmn tmo tmt tmx tna tnb tnc tne tni tnk tnm tnn tno tnt tnx to- toa tob toc toe toi tok tom ton too tot tox tta ttb ttc tte tti ttk ttm ttn tto ttt ttx txe txi txk txn txt xaa xac xak xam xan xat xbc xbe xbx xcb xci xcx xee xem xen xet xex xia xic xie xii xin xio xit xix xkb xke xma xmc xmi xmk xmm xmo xmt xmx xna xnc xnk xno xoa xoc xoi xok xom xon xoo xot xox xtc xti xtm xtx xxi xxo xxx