vvvvvv
 moutain: ◢◢◼◼◣◣◢◣◼◼◼◼◢◣◢◢◢◢◢◢◢◢◣◢◣◣◣◣◣◣◣◣
 expected:◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◢◣◢◣◻◻◻◻◻◻◻
          ◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◢◼◼◼◼◣◻◻◻◻◻◻
          ◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◢◼◼◼◼◼◼◣◻◻◻◻◻
          ◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◢◼◼◼◼◼◼◼◼◣◻◻◻◻
          ◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◢◼◼◼◼◼◼◼◼◼◼◣◻◻◻
          ◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◻◢◼◼◼◼◼◼◼◼◼◼◼◼◣◻◻
          ◻◢◼◼◣◻◻◻◻◻◻◻◻◻◻◢◼◼◼◼◼◼◼◼◼◼◼◼◼◼◣◻
          ◢◼◼◼◼◣◢◣◻◻◻◻◢◣◢◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼◣
                       ^^^^^^

• not in the fixed/sample tests
• not described (but if present in the tests, might be left aside, I guess)