Laura really hates people using acronyms in her office and wants to force her colleagues to remove all acronyms before emailing her. She wants you to build a system that will edit out all known acronyms or else will notify the sender if unknown acronyms are present.

Any combination of three or more letters in upper case will be considered an acronym. Acronyms will not be combined with lowercase letters, such as in the case of 'KPIs'. They will be kept isolated as a word/words within a string.

For any string: 

All instances of 'KPI' must become "key performance indicators" 
All instances of 'EOD' must become "the end of the day" 
All instances of 'TBD' must become "to be decided"
All instances of 'WAH' must become "work at home"
All instances of 'IAM' must become "in a meeting"
All instances of 'OOO' must become "out of office"
All instances of 'NRN' must become "no reply necessary"
All instances of 'CTA' must become "call to action"
All instances of 'SWOT' must become "strengths, weaknesses, opportunities and threats"
If there are any unknown acronyms in the string, Laura wants you to return only the message:
'[acronym] is an acronym. I do not like acronyms. Please remove them from your email.'
So if the acronym in question was 'BRB', you would return the string:
'BRB is an acronym. I do not like acronyms. Please remove them from your email.'
If there is more than one unknown acronym in the string, return only the first in your answer.

If all acronyms can be replaced with full words according to the above, however, return only the altered string.

If this is the case, ensure that sentences still start with capital letters. '!' or '?' will not be used.

```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 re\n\nd = {\n    "KPI": "key performance indicators", "EOD": "the end of the day", "TBD": "to be decided",\n    "WAH": "work at home", "IAM": "in a meeting", "OOO": "out of office",\n    "NRN": "no reply necessary", "CTA": "call to action", "SWOT": "strengths, weaknesses, opportunities and threats"\n}\n\ndef acronym_buster(s):\n    a = []\n    def f(x):\n        x = x[0]\n        if x.isupper() and len(x) > 2:\n            if x not in d:\n                a.append(x)\n            x = d.get(x, "")\n        return x\n    s = re.sub(r"^.|[!?.] .", lambda x: x[0].upper(), re.sub(r"\\w+", f, s))\n    return f"{a[0]} is an acronym. I do not like acronyms. Please remove them from your email." if a else s'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'acronym_buster'
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: 39579