5.4 Consistency and grammars

• delete/insert character
• delete/insert word
• delete/insert line
• delete/insert paragraph

• move-cursor-one-character-forward [Dir = forward, Unit = char]
• move-cursor-one-character-backward [Dir = backward, Unit = char]
• move-cursor-one-word-forward [Dir = forward, Unit = word]
• move-cursor-one-word-backward [Dir = backward, Unit = word]
• task[Dir,Unit] $\rightarrow$ symbol[Dir]+letter[Unit]
• symbol[Dir=forward] $\rightarrow$ CTRL
• symbol[Dir=backward] $\rightarrow$ ESC
• letter[Unit=word] $\rightarrow$ W
• letter[Unit=char] $\rightarrow$ C