1dr2 2dr2x 3dr2x3 4dr2 5dr2x

q4r2x r4r2x3 s4r2 t4r2x u4r2x3

fvs2x3 gvs2 hvs2x ivs2x3 jvs2

4lt2 5lt2x 6lt2x3 7lt2 8lt2x

tcu2x ucu2x3 vcu2 wcu2x xcu2x3