obu[7], buz[7], bzu[7], boy[6], oby[6], bzy[6], bee[5], bez[5], ozu[5], uzo[5], ezy[4], ozy[4], ezo[3],
bu[6], by[5], be[4], bo[4], ee[2], eo[2], ez[2], ze[2], oz[2],
