```if-not:rust
Your task is to write a function `toLeetSpeak` that converts a regular english sentence to Leetspeak.
```
```if:rust
Your task is to write a function `to_leet_speak` that converts a regular english sentence to Leetspeak.
```

More about LeetSpeak You can read at wiki -> https://en.wikipedia.org/wiki/Leet

Consider only uppercase letters (no lowercase letters, no numbers) and spaces.

For example:

```if-not:rust
~~~
toLeetSpeak("LEET") returns "1337"
~~~
```
```if:rust
~~~
to_leet_speak("LEET") returns "1337"
~~~
```

In this kata we use a simple LeetSpeak dialect. Use this alphabet:

```
{
  A : '@',
  B : '8',
  C : '(',
  D : 'D',
  E : '3',
  F : 'F',
  G : '6',
  H : '#',
  I : '!',
  J : 'J',
  K : 'K',
  L : '1',
  M : 'M',
  N : 'N',
  O : '0',
  P : 'P',
  Q : 'Q',
  R : 'R',
  S : '$',
  T : '7',
  U : 'U',
  V : 'V',
  W : 'W',
  X : 'X',
  Y : 'Y',
  Z : '2'
}
```

```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 = "import unittest\n\nMAPPING_TABLE = {\n  'A': '@',\n  'B': '8',\n  'C': '(',\n  'D': 'D',\n  'E': '3',\n  'F': 'F',\n  'G': '6',\n  'H': '#',\n  'I': '!',\n  'J': 'J',\n  'K': 'K',\n  'L': '1',\n  'M': 'M',\n  'N': 'N',\n  'O': '0',\n  'P': 'P',\n  'Q': 'Q',\n  'R': 'R',\n  'S': '$',\n  'T': '7',\n  'U': 'U',\n  'V': 'V',\n  'W': 'W',\n  'X': 'X',\n  'Y': 'Y',\n  'Z': '2',\n  ' ': ' '\n}\n\n\ndef to_leet_speak(str_):\n    return ''.join(MAPPING_TABLE[char] for char in str_)\n    \n    \nclass TestToLeekSpeak(unittest.TestCase):\n    def test_to_leek_speak(self):\n        str_ = 'LEET'\n        actual = to_leek_speak(str_)\n        self.assertEqual(actual, '1337')\n\n    def test_to_leek_speak_with_empty_space(self):\n        str_ = 'HELLO WORLD'\n        actual = to_leek_speak(str_)\n        self.assertEqual(actual, '#3110 W0R1D')\n"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'to_leet_speak'
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: 5492