Compression
1) Buses are more expensive than bicycles. 2) Airplanes are more expensive than buses. 3) Airplanes are more expensive than trains. 4) Airplanes are more expensive than boats. 5) Airplanes are more expensive than taxis. 6) Airplanes are more expensive than bicycles. 7) Trains are more expensive than buses. 8) Trains are more expensive than bicycles. 9) Boats are more expensive than buses. 10) Boats are more expensive than trains. 11) Boats are more expensive than taxis. 12) Boats are more expensive than bicycles. 13) Taxis are more expensive than trains. 14) Taxis are more expensive than buses. 15) Taxis are more expensive than bicycles. 16) Buses are safer than airplanes. 17) Buses are safer than trains. 18) Buses are safer than boats. 19) Airplanes are safer than boats. 20) Trains are safer than airplanes. 21) Taxis are safer ...