ab8n 9a8na1 8a8na 7a8n 6a8na1
lk7na1 kk7na jk7n ik7na1 hk7na
wt6na vt6n ut6na1 tt6na st6n
725n 625na1 525na 425n 325na1
ic5na1 hc5na gc5n fc5na1 ec5na