% ruby space.rb simulate public_3.in 
=== Starports ===
Earth 1
Vulcan 1
=== Starships ===
Enterprise 2
=== Travelers ===
Kirk Earth Vulcan 
Spock Vulcan Earth 
McCoy Earth Vulcan 
=== Output ===
Enterprise docking at Earth
  Kirk boarding Enterprise at Earth
  McCoy boarding Enterprise at Earth
Enterprise departing from Earth
Enterprise docking at Vulcan
  McCoy departing Enterprise at Vulcan
  Kirk departing Enterprise at Vulcan
  Spock boarding Enterprise at Vulcan
Enterprise departing from Vulcan
Enterprise docking at Earth
  Spock departing Enterprise at Earth
Enterprise departing from Earth
