yxfr zxfr2 0xfr2l 1xfr 2xfr2
nogr2 oogr2l pogr qogr2 rogr2l
cfhr2l dfhr efhr2 ffhr2l gfhr
15hr 25hr2 35hr2l 45hr 55hr2
qwir2 rwir2l swir twir2 uwir2l