bacy[8], caby[8], baca[7], caba[7], scab[7], cacy[7], cyca[7], basy[7], caca[6], basa[6], saab[6],
cab[6], aby[6], cyc[6], bas[5], asy[4], asa[3],
by[5], ba[4], aa[2], as[2],