WHY DID THE TITAN SUBMARINE IMPLODE?

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BZMCTYHIZBJKSM JUAKYORKCMZSXI ELIRNEGLIGENCE QGWXVKDITBPKNY HYOBRAVERYNOOK GYTEICOSRACWIF NNMISFORTUNETC UERVCEBUSHSNIR XLJMKVRYLGNRBT YOHJTEATUWCTMT VEGYRHWSJBUEAN
1.
nature
2.
misfortune
3.
ambition
4.
negligence
5.
bravery
6.
society
7.
ego