Assertion: racket's string | /r/CapableOf | start with the four most important ones
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Source sentences:
text: Strings with more than one character denote arrow keys or other special events, starting with the four most important ones: "left" is the left arrow; "right" is the right arrow; "up" is the up arrow; "down" is the down arrow; Here are some others that you may encounter: "start" "cancel" "clear" "shift" "rshift" "control" "rcontrol" "menu" "pause" "capital" "prior" "next" "end" "home" "escape" "select" "print" "execute" "snapshot" "insert" "help" function keys: "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", "f24" "numlock" "scroll" The following four count as keyevents even though they are triggered by physical events on some form of mouse: "wheel-up" "wheel-down" "wheel-left"