2setm 1set 0setmb zsetm yset

d2dt c2dtmb b2dtm a2dt 91dtmb

obdtmb nbdtm mbdt lbdtmb kbdtm

zkctm ykct xkctmb wkctm vkct

aubt 9tbtmb 8tbtm 7tbt 6tbtmb