61nnu7 51nnu 41nn 31nnu7 21nnu

hbnnu gbnn fbnnu7 ebnnu dbnn

skmn rkmnu7 qkmnu pkmn okmnu7

3tlnu7 2tlnu 1tln 0tlnu7 ztlnu

e3knu d3kn c3knu7 b3knu a3kn