txt: text exchanging thing (step)

Program

Input

load step

output area

whuh?

now you can load program and step through

Examples

# binary collatz function

_1T > _Tc1
_0T > _T0
_^T > _^
_^c > _^1
_0c > _1
_1c > _c0
_0$ > _$
_1$ > _1Tc$
_^0 > _^

,

_^11011$

---

# the waterfall model
# http://nethack4.org/esolangs/waterfall/

a[] b[ c[ > a[ooo] b[ c[oooooo
a[ b[] c[ > a[oooooo b[ooo] c[
a[ b[ c[] > a[ b[ooooooooo c[ooo]
ao bo co >

,

a[o]
b[oo]
c[ooo]

---

# 2-tag system
# https://esolangs.org/wiki/Tag_system

S1 _$ > _3321H$
S2 _$ > _331$
S3 _$ > _33$

_^11 > _^ S1
_^12 > _^ S1
_^13 > _^ S1
_^21 > _^ S2
_^22 > _^ S2
_^23 > _^ S2
_^31 > _^ S3
_^32 > _^ S3
_^33 > _^ S3

,

_^211$