Input (grade 12): LiÃ ge Airport is the world hub of TNT Airways, and the European hub of CAL Cargo Air Lines, El Al Cargo, Ethiopian Cargo and Avient Aviation.
Output (grade 12): LiÃ ge Airport is the world hub of TNT Airways, and the European hub of CAL Cargo Air Lines, El Al Cargo and Ethiopian Cargo (using Southern Air aircrafts).