1w6b 2w6b2 3w6b28 4w6b 5w6b2
qn7b2 rn7b28 sn7b tn7b2 un7b28
fe8b28 ge8b he8b2 ie8b28 je8b
448b 548b2 648b28 748b 848b2
tv9b2 uv9b28 vv9b wv9b2 xv9b28