Potential answers for "Old agricultural letters"

⭐⭐⭐⭐ DDT
⭐⭐ ETHS
⭐⭐ EDHS
⭐⭐ USSR
⭐⭐ SSR
⭐⭐ BCE
⭐⭐ CCCP
⭐⭐ TWA
⭐⭐ VGA

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