sentence = "um, " + sentence;

class Node:
    def __init__(self,value,prev=None):
        self.value=value
        self.prev=prev
    def printR(self):
        print(self.value)
        if self.prev:
            self.prev.printR()
    def add(self,value):
        if not self.prev:
            self.prev=Node(value)
        else:
            self.prev.add(value)

> Math["\x176"]
< undefined

let 2+2=5 in 2+2
> 5

def addList(self, lst):
	for x in lst:
		self.add(x)

>>> class foo: pass

>>> f = foo()
>>> dir(f)
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__']
>>> f.__class__
<class '__main__.foo'>
>>> f.__hash__()
-9223372036851251284
>>> hash(f)
-9223372036851251284
>>> str(f)
'<__main__.foo object at 0x00000000035C7AC8>'

class Reflecter(object):
    def find(self):
        return [k for k, v in globals().items() if v is self][0]

open System
let r=Random()
let rec f()=
    let s=List.init 10(fun _->string<|r.Next()%2)
    if Seq.exists2(fun i j->i="1"&&i=j)(Seq.take 9 s)(Seq.skip 1 s)then f()else String.Join("",s)