The EAST command
Typing EAST means GO EAST or WALK EAST. That is, direct the player character eastward from their current location. Assuming there's an exit in that direction and nothing is blocking or hindering the character, the PC will travel east to an adjacent location.
East in other languages
1 Esperanto's words for west and east are okcidento and oriento, which means it's problematic to use o as an abbreviation for either of them. There aren't enough Esperanto IF games to see any clear concensus on how to abbreviate orienten, but or seems the most likely possibility.
Directions like EAST tend to be implemented both as room properties and as objects in their own right. The EAST command, however, tends to be parsed or reinterpreted as a GO command acting on the east object.
|Code Compare: East|
|ADRIFT 4:||Move East to Study|
|Inform 6:||The e_to property and e_obj object|
|Inform 7:||The east direction|
|TADS 3:||The east link property, the eastDirection object,|
and the defaultEastWall object