biga[8], giba[8], bigi[8], bida[7], dagi[7], gida[7],
big[7], gib[7], ghi[7], bad[6], dba[6], dag[6], gad[6], bid[6], gid[6], bai[5], agi[5], gai[5], hai[5],
ba[4], ag[4], ha[4], bi[4], hi[4], ad[3], da[3], id[3], ii[2],
