5ztb2 4ztb 3ztb28 2ztb2 1ztb

g9sb f9sb28 e9sb2 d9sb c9sb28

risb28 qisb2 pisb oisb28 nisb2

2rrb2 1rrb 0rrb28 zrrb2 yrrb

d1qb c1qb28 b1qb2 a1qb 90qb28