% ruby space.rb simulate public5.in 
=== Starports ===
Earth 2
Vulcan 1
Romulus 1
=== Starships ===
Enterprise 2
Voyager 1
=== Travelers ===
Kirk Earth Vulcan Earth 
Spock Vulcan Earth Romulus 
McCoy Earth Romulus 
=== Output ===
Enterprise docking at Earth
  McCoy boarding Enterprise at Earth
  Kirk boarding Enterprise at Earth
Voyager docking at Earth
Enterprise departing from Earth
Voyager departing from Earth
Enterprise docking at Vulcan
  Kirk departing Enterprise at Vulcan
Enterprise departing from Vulcan
Voyager docking at Vulcan
  Kirk boarding Voyager at Vulcan
Enterprise docking at Romulus
  McCoy departing Enterprise at Romulus
Voyager departing from Vulcan
Enterprise departing from Romulus
Voyager docking at Romulus
Enterprise docking at Earth
Voyager departing from Romulus
Enterprise departing from Earth
Voyager docking at Earth
  Kirk departing Voyager at Earth
Enterprise docking at Vulcan
  Spock boarding Enterprise at Vulcan
Voyager departing from Earth
Enterprise departing from Vulcan
Voyager docking at Vulcan
Enterprise docking at Romulus
Voyager departing from Vulcan
Enterprise departing from Romulus
Voyager docking at Romulus
Enterprise docking at Earth
  Spock departing Enterprise at Earth
Voyager departing from Romulus
Enterprise departing from Earth
Voyager docking at Earth
  Spock boarding Voyager at Earth
Enterprise docking at Vulcan
Voyager departing from Earth
Enterprise departing from Vulcan
Voyager docking at Vulcan
Enterprise docking at Romulus
Voyager departing from Vulcan
Enterprise departing from Romulus
Voyager docking at Romulus
  Spock departing Voyager at Romulus
Enterprise docking at Earth
Voyager departing from Romulus