Five friends — Amira, Bea, Callum, Dev, and Eli — are planning to hang out this weekend. Only four of them can go due to limited space and some recent disagreements.

They must follow these rules:

• Amira, Bea, and Callum cannot all go together, but at least one of them must be included.
• Callum and Dev cannot both be there.
• Eli will only go if Bea goes.