4r9s 3r9s23 2r9s2 1r9s 0r9s23
f18s23 e18s2 d18s c18s23 b18s2
qa8s2 pa8s oa8s23 na8s2 ma8s
1j7s 0j7s23 zj7s2 yj7s xj7s23
ct6s23 bt6s2 at6s 9s6s23 8s6s2