d2ir c2irrp b2irr a2ir 91irrp

obirrp nbirr mbir lbirrp kbirr

zkhrr ykhr xkhrrp wkhrr vkhr

augr 9tgrrp 8tgrr 7tgr 6tgrrp

l3frrp k3frr j3fr i3frrp h3frr