-ana -ane -ene aaaa aaac aaae aaan aaca aacc aace aacn aaea aaec aaen aana aane acaa acac acae acan acca accc acce ace- acea acec acen acne aeac aean aena ana- anaa anac anae anan anax anca ancc ance anec anee anen anex anna anne axan axce axen caaa caac caan cac- caca cacc cace caec caen caex cana canc cane cann caxa ccaa ccac ccca cccc ccee ccna ccnc ccne ceac cean cec- ceca cece ceec cen- cena cene cexe cnaa cnac cnex cnna cxxx eaca eacc eaec eana ecaa ecac ecan ecca eccc ecce ecne eeca eeea eeee eena enac enan enca ence enea enee enna ennc enne exa- exan exec exen naaa naac naan naca nacc nace naea nan- nana nane nann ncaa ncac ncca nccc nccn ncea ncec ncee ncen ncna ncnc neac nean neca necc nece neea neen nena nene nexe nexx nnnn xace xana xen- xena xene xenn xexe xnee xxxx