# Number encrypting: cypher
## Part I of Number encrypting Katas
***

## Introduction
Back then when the internet was coming up, most search functionalities simply looked for keywords in text to show relevant documents. Hackers weren't very keen on having their information displayed on websites, bulletin boards, newsgroups or any other place, so they started to replace certain letters in words. It started out with simple vowel substitutions like a 4 instead of an A, or a 3 instead of an E. This meant that topics like cracking or hacking remained undetected.

Here we will use a reduced version of the *Leet Speak alphabet*, but you can find more information [here](http://www.gamehouse.com/blog/leet-speak-cheat-sheet/) or at [Wikipedia](https://en.wikipedia.org/wiki/Leet).

## Task
You will receive a string composed by English words, `string`. You will have to return a cyphered version of that string.

The numbers corresponding to each letter are represented at the table below. Notice that different letters can share the same number. In those cases, one letter will be upper case and the other one lower case.


  .cell {
    border: 1px solid white;
    text-align: center;
    width: 7%;
  }
  
  .title {
    border: 1px solid white;
    border-bottom: 1px solid white;
    text-align: center;
    min-width: 11em;
  }
  
  .no-border {border: none}
  
  table {
    margin-bottom: 10px
  }



  
    
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
  
  
    Upper case
    I
    R
    E
    A
    S
    G
    T
    B
    
    O
  
  
    Lower case
    l
    z
    e
    a
    s
    b
    t
    
    g
    o
  
  



Any character that is not at the table, does not change when cyphered.

## Examples

  * **Input:** "Hello World". **Output**: "H3110 W0r1d"
  * **Input:** "I am your father". **Output**: "1 4m y0ur f47h3r"
  * **Input:** "I do not know what else I can test. Be cool. Good luck". **Output**: "1 d0 n07 kn0w wh47 3153 1 c4n 7357. 83 c001. 600d 1uck"

## Part II
If you liked this Kata, you can find the [part II: *Number encrypting: decypher*](https://www.codewars.com/kata/number-encrypting-decypher), where your goal is to decypher the strings.

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

def _disabled_input(*args, **kwargs):
    raise RuntimeError("input() is disabled in callable mode")
builtins.input = _disabled_input

ns = {"__name__": "__judge__"}  # prevent if __name__ == "__main__" blocks
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = "def cypher(string):\n    D = {'I' :'1', 'l':'1', 'R':'2', 'z':'2', 'E':'3', 'e':'3',\n    'A':'4', 'a':'4', 'S':'5', 's':'5', 'G':'6', 'b':'6',\n    'T':'7', 't':'7', 'B':'8', 'g':'9', 'O':'0', 'o':'0'}\n    return ''.join([ D.get(i, i) for i in string ])"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'cypher'
if _fn_name:
    if "Solution" in ns:
        try:
            _obj = ns["Solution"]()
            if hasattr(_obj, _fn_name):
                _target = getattr(_obj, _fn_name)
        except Exception:
            _target = None
    if _target is None and _fn_name in ns and callable(ns[_fn_name]):
        _target = ns[_fn_name]
# Fallback: if there's exactly one user-defined function, use it
if _target is None:
    _cands = [v for k, v in ns.items() if callable(v) and getattr(v, "__module__", "") in ("__judge__", "__main__")]
    _user_funcs = [c for c in _cands if getattr(c, "__name__", "").startswith("_") is False]
    if len(_user_funcs) == 1:
        _target = _user_funcs[0]
if _target is None:
    raise RuntimeError(f"Could not resolve callable '{_fn_name}'")

_raw = sys.stdin.read().strip()
if _raw:
    _parsed = json.loads(_raw)
    if isinstance(_parsed, dict):
        _kwargs = _parsed.get("kwargs", {})
        _args = _parsed.get("args", [])
    else:
        _args, _kwargs = _parsed, {}
else:
    _args, _kwargs = [], {}
if not isinstance(_args, (list, tuple)):
    _args = [_args]
_res = _target(*_args, **_kwargs)
try:
    sys.stdout.write(repr(_res) + "\n")
except Exception:
    pass

```

Measured memory_bytes: 6208