17/1	⎇}<⎇[@]␈316417≤closure≥{ 
115/1	⎇}<⎇[@]␈316420≤fixed-point operator≥{ 
254/1	⎇}<⎇[@]␈316423≤mutual recursion≥{ 
18/1	⎇}<⎇[@]␈316418≤open function≥{ 
295/1	⎇}<⎇[@]␈316425≤special form≥{