aul2 bul2l cul2lt dul2 eul2l

zkm2l 0km2lt 1km2 2km2l 3km2lt

obn2lt pbn2 qbn2l rbn2lt sbn2

d2n2 e2n2l f2n2lt g2n2 h2n2l

2so2l 3so2lt 4so2 5so2l 6so2lt