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Hexagram 21: gnawing bite; R Wilhelm 21: biting through; Hua-Ching Ni 21: biting through hardship; HDS Gate 21: gate of the hunter/huntress, biting through; S Reifler 21: biting through; J Blofeld 21: gnawing; S Karcher 21: biting through, the sacred meal; GeneKey 21: a noble life