**Getting Familiar:**
LEET: (sometimes written as "1337" or "l33t"), also known as eleet or leetspeak, is another alphabet for the English language that is used mostly on the internet. It uses various combinations of ASCII characters to replace Latinate letters. For example, leet spellings of the word leet include 1337 and l33t; eleet may be spelled 31337 or 3l33t.

GREEK: 
The Greek alphabet has been used to write the Greek language since the 8th century BC. It was derived from the earlier Phoenician alphabet, and was the first alphabetic script to have distinct letters for vowels as well as consonants. It is the ancestor of the Latin and Cyrillic scripts.Apart from its use in writing the Greek language, both in its ancient and its modern forms, the Greek alphabet today also serves as a source of technical symbols and labels in many domains of mathematics, science and other fields.

**Your Task :** 

    You have to create a function **GrεεκL33t** which    
    takes a string as input and returns it in the form of 
    (L33T+Grεεκ)Case.
    Note: The letters which are not being converted in 
    (L33T+Grεεκ)Case should be returned in the lowercase.

**(L33T+Grεεκ)Case:**

    A=α (Alpha)      B=β (Beta)      D=δ (Delta)
    E=ε (Epsilon)    I=ι (Iota)      K=κ (Kappa)
    N=η (Eta)        O=θ (Theta)     P=ρ (Rho)
    R=π (Pi)         T=τ (Tau)       U=μ (Mu)      
    V=υ (Upsilon)    W=ω (Omega)     X=χ (Chi)
    Y=γ (Gamma)
    
**Examples:**

    GrεεκL33t("CodeWars") = "cθδεωαπs"
    GrεεκL33t("Kata") = "κατα"

```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 = 'lib = {\'a\':\'α\', \'b\':\'β\', \'d\':\'δ\', \'e\':\'ε\', \'i\':\'ι\', \'k\':\'κ\', \'n\':\'η\', \'o\':\'θ\', \'p\':\'ρ\', \'r\':\'π\', \'t\':\'τ\', \'u\':\'μ\', \'v\':\'υ\', \'w\':\'ω\', \'x\':\'χ\', \'y\':\'γ\'}\ngr33k_l33t = lambda s: "".join([lib[c] if c in lib else c for c in s.lower()])'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'gr33k_l33t'
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: 5512