In□esti□at□rs □e□rned t□at the□group had been□f□ie□□s□for □ears, but □□cently □he□e□ha□ □een tens□on amon□ t□em. Rum□rs □f□disagree□□nts□and argumen□s du□ing□the trip□began to sur□ace, leading aut□oriti□s to specul□te□□het□e□ fo□l play □a□□involved. E□ch membe□ of□the g□□up □ad a different st□□y t□ tell, and the□inconsi□ten□ies □n their□accounts onl□ a□ded to th□ □□ste□y of □he missing □ine.8. 纪律严明
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