barr[6], birr[6], brau[6], raub[6],
abi[5], bai[5], bar[5], brr[5], bau[5], air[3], rai[3], rar[3], irr[3], rau[3],
ab[4], bi[4], ai[2], ar[2], au[2], ui[2], ur[2],
