18 bcdef,afghc,abhid,acije,adjklf,aelmgb,bfmnh,bgnoic,chopjd,dipke,ejpql,ekqrmf,flrng,gmroh,hnrqpi,ioqkj,kporl,lqonm
18 bcdef,afghic,abijkd,ackle,adlmnf,aengb,bfnoh,bgopi,bhpjc,cipqk,cjqld,dkqme,elqrn,emrogf,gnrph,horqji,jprmlk,mqpon
18 bcdef,afghc,abhid,acijke,adklmnf,aengb,bfnoh,bgopic,chpjd,dipqk,djqle,ekqrm,elron,emogf,gnmrph,horqji,jprlk,lqpom
18 bcdef,afghic,abijd,acjkle,adlmnf,aengb,bfnoh,bgopi,bhpjc,cipkd,djpql,dkqme,elqrn,emrogf,gnrph,horqkji,kprml,mqpon
18 bcdef,afghc,abhid,acijkle,adlmf,aemgb,bfmnh,bgnoic,chojd,diopk,djpql,dkqme,elqrngf,gmroh,hnrpji,jorqk,kprml,mqpon
18 bcdef,afghc,abhijkd,ackle,adlmf,aemngb,bfnoh,bgoic,chopj,cipqk,cjqrld,dkrme,elrnf,fmrqpog,gnpih,ionqj,jpnrk,kqnml
18 bcdefg,aghic,abijd,acjkle,adlmf,aemng,afnhb,bgnopi,bhpjc,cipkd,djpql,dkqrme,elrnf,fmrohg,hnrqp,hoqkji,kporl,lqonm
18 bcdefg,aghijc,abjkd,acklme,admnf,aenog,afohb,bgopqi,bhqrj,birkc,cjrld,dkrqm,dlqpne,empof,fnphg,honmq,hpmlri,iqlkj
18 bcdefg,aghic,abijd,acjkle,adlmf,aemng,afnohb,bgopqi,bhqjc,ciqkd,djqpl,dkprme,elrnf,fmrog,gnrph,horlkq,hpkji,lponm
18 bcdefg,aghic,abijd,acjkle,adlmf,aemng,afnohb,bgopi,bhpjc,cipkd,djpql,dkqrme,elrnf,fmrog,gnrqph,hoqkji,kporl,lqonm
18 bcdef,afghc,abhid,acijklme,admnf,aengb,bfnopqrh,bgric,chrjd,dirqk,djqpl,dkpom,dlone,emogf,gnmlp,golkq,gpkjr,gqjih
18 bcdef,afghijc,abjkd,ackle,adlmf,aemngb,bfnoh,bgopi,bhpqj,biqkc,cjqld,dkqme,elqrnf,fmrog,gnrph,horqi,iprmlkj,mqpon