6a9r2b 5a9r2 4a9r 3a9r2b 2a9r2
hk8r2 gk8r fk8r2b ek8r2 dk8r
st7r rt7r2b qt7r2 pt7r ot7r2b
326r2b 226r2 126r 026r2b z26r2
ec6r2 dc6r cc6r2b bc6r2 ac6r