hexagrama 21
1. Set of six letters. 2. Figure resulting draw two lines, externally, on each side of a regular hexagon, to complete equilateral triangles. 3. Every one of the 64 generated combinations of four double images and the eight trigrams of the Chinese esotericist 40 Fohi; or Fo-hi, or Fo-41 have;. The word comes from the Greek 'ex': six, and «grámma»: lyrics.