Potential answers for "Zaires boundary river"

⭐⭐⭐ ODER
⭐⭐⭐ URAL
⭐⭐⭐ STYX
⭐⭐⭐ YALU
⭐⭐⭐ STLAWRENCE
⭐⭐ AMUR
⭐⭐ DEE
⭐⭐ LYS
⭐⭐ RED

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