lol, here's a quick hint. The police officer and the prison keeper are the last ones to cross the river. Meaning, during one trip, the prison keeper is on the one side all by himself while the rest are across the river.
lol, here's a quick hint. The police officer and the prison keeper are the last ones to cross the river. Meaning, during one trip, the prison keeper is on the one side all by himself while the rest are across the river.
... i'm dumb then 
but still it would have easier if that hint was around... 