Problem: The Orbai River is a headwater of the Ojdula River in Romania .
The Ojdula River is a source of the Orbai River in Romania .
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A: no

Problem: The Sic River is a tributary of the Seolemai River in Romania .
The river Seolemai is a tributary of the River Sic in Romania .
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A: no

Problem: See also list of finite abelian groups for small groups of order 30 or less .
See also a list of small groups for finite Abelian groups of order 30 or less .
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A:
no