_A mad sociopath scientist just came out with a brilliant invention! He extracted his own memories to forget all the people he hates! Now there's a lot of information in there, so he needs your talent as a developer to automatize that task for him._

> You are given the memories as a string containing people's surname and name (comma separated). The scientist marked one occurrence of each of the people he hates by putting a '!' right before their name.

**Your task is to destroy all the occurrences of the marked people.
One more thing ! Hate is contagious, so you also need to erase any memory of the person that comes after any marked name!**

---
Examples
---
---
Input:
```
"Albert Einstein, !Sarah Connor, Marilyn Monroe, Abraham Lincoln, Sarah Connor, Sean Connery, Marilyn Monroe, Bjarne Stroustrup, Manson Marilyn, Monroe Mary"
```
Output:
```
"Albert Einstein, Abraham Lincoln, Sean Connery, Bjarne Stroustrup, Manson Marilyn, Monroe Mary"
```
=> We must remove every memories of Sarah Connor because she's marked, but as a side-effect we must also remove all the memories about Marilyn Monroe that comes right after her! Note that we can't destroy the memories of Manson Marilyn or Monroe Mary, so be careful!

```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 select(memory):\n    hates = set()\n    h = False\n    for name in memory.split(', '):\n        if name.startswith('!'):\n            hates.add(name.lstrip('!'))\n            h = True\n        elif h:\n            hates.add(name.lstrip('!'))\n            h = False\n    return ', '.join(name for name in memory.split(', ') if name.lstrip('!') not in hates)"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'select'
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: 6410