a-a a-b aaa aab aae aah aaj ab- aba abb abe abh abj aea aeb aee aeh aej aha ahb ahe ahh ahj aja ajb aje ajh ajj baa bab bae bah baj bba bbb bbe bbh be- bea beb bee beh bha bhb bhe bhh bhj bja bjj eaa eab eae eah eaj eba ebb ebe ebh ebj eea eeb eee eha ehb ehe ehh eja haa hab hae hah haj hba hbb hbe hbh hbj he- hea heb hee heh hej hha hhb hhe hhh hhj hja jaa jab jae jah jaj jba jbj jea jeb jee jeh jej jha jhe jhj jja jjb jjj