foce[9], efod[9], dech[8], echo[7], heco[7], codo[6],
efo[7], che[6], ech[6], hec[6], hoc[6], och[6], cod[5], doc[5], oho[5], deo[4], ode[4], odo[4],
ef[6], fe[6], eh[4], he[4], ho[4], oh[4], ce[3], de[3], co[3], do[3], od[3], eo[2],
