## Solution to: Alien Alert

Yes, all individuals can reach the other planet! Consider the following abbreviations for the individuals:

- F = Federation Officer
- A = alien that can fly the space ship
- a = alien that cannot fly the space ship

Then the flight schedule to reach the other planet is the following:

planet 1 flight planet 2 F F F A a a -- A a --> F F F a A a <-- A ---- F F F A a A a -- A a --> F F F A a a <-- A ---- F F F A a a -- F F --> F A F F a a <-- F a -- F F A a F a -- F A --> F a F F A a <-- F a -- F F a a F A -- F F --> a a F F F A <-- A ---- A a a F F F -- A a --> a F F F A a <-- A ---- A a F F F a -- A a --> F F F A a a

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