sbif rbifn2 qbifn pbif obifn2

3khfn2 2khfn 1khf 0khfn2 zkhfn

eugfn dugf cugfn2 bugfn augf

p3ff o3ffn2 n3ffn m3ff l3ffn2

0cffn2 zcffn ycff xcffn2 wcffn