bosy[7], byss[7], boss[6], ospy[6], osyp[6], poss[5], sosy[5],
boy[6], oby[6], opy[5], psy[5], spy[5], syp[5], osp[4], pss[4], osy[4], sos[3],
by[5], bo[4], op[3], po[3], os[2],