(⫙): Pop [f], Map f to the entire stack
(ß): Pop [x] Push ([bin(n) for n in range(x)])
(⎝): Pop [x -- zipmap] Push (min(x))
(⎠): Pop [x -- zipmap] Push (max(x))
(⎡): Pop [x, y]  Push (max(x, y))
(⎣): Pop [x, y]  Push (min(x, y))

(⨥): Pop [x] Push (x + 1) / Used in regex
(⨪): Pop [x] Push (x - 1)
(∺): Pop [x] Push (x % 2)
(❝): Push ("")

0 £strikes
0 £balls
? £character
{
  ¥strikes 3 <
  ¥balls 4 < ∨
|
  ¥character
  §
  \S: ¥strikes ⨥ £strikes|
  \B: ¥balls ⨥ £balls|
  \F: ¥strikes 2 ≤ [¥strikes ⨥ £strikes]|
  \H: \W,Q|
  \X: \X,Q
  ;

  £character
}

¥strikes 3 = [\S|\B] ,

0£s0£b?{¥s3<¥b4<∨|§\S:¥s⨥£s|\B:¥b⨥£b|\F:¥s2≤[¥s⨥£s]|\H:\W,Q|\x:\X,Q;}¥s3=[\S|\B