caca[6], taca[6], taco[6], scat[6], stoa[5],
tac[5], soc[4], ata[4], tao[4], sto[4], asa[3], osa[3],
co[3], at[3], ta[3], ot[3], to[3], ts[3], aa[2], as[2], os[2],
