Another Fibonacci... yes but with other kinds of result.
The function is named `aroundFib` or `around_fib`, depending of the language.
Its parameter is `n` (positive integer).

First you have to calculate `f` the value of `fibonacci(n)` with `fibonacci(0) --> 0` and
`fibonacci(1) --> 1` (see: )

- 1) Find the count of each digit `ch` in `f` (`ch`: digit from 0 to 9), call this count `cnt` and find the maximum
value of `cnt`, call this maximum `maxcnt`. If there are ties, the digit `ch` to consider is the first one - in natural digit order - giving `maxcnt`.

- 2) Cut the value `f` into chunks of length at most `25`. The last chunk may be 25 long or less.

```
Example: for `n=100` you have only one chunk `354224848179261915075`
Example: for `n=180` f is `18547707689471986212190138521399707760` and you have two chunks 
`1854770768947198621219013` and `8521399707760`. First length here is 25 and second one is 13.
```

- At last return a string in the following format:
"Last chunk ...; Max is ... for digit ..."

where Max is `maxcnt` and digit the first `ch` (in 0..9) leading to `maxcnt`.


```
Example: for `n=100` -> "Last chunk 354224848179261915075; Max is 3 for digit 1" 
Example: for `n=180` -> "Last chunk 8521399707760; Max is 7 for digit 7"
Example: for `n=18000` -> "Last chunk 140258776000; Max is 409 for digit 1"
```
# Beware: 
`fib(18000)` has `3762` digits. Values of `n` are between `500` and `25000`.

# Note
Translators are welcome for all languages, except for Ruby since the Bash tests needing Ruby a Ruby reference solution is already there though not yet published.

```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 around_fib(n):\n    f = str(fib(n))\n    ch = ['9', '8', '7', '6', '5', '4', '3', '2', '1', '0']\n    maxcnt = 0\n    chunk = ''\n\n    for digit in ch:\n        cnt = f.count(digit)\n        if cnt >= maxcnt:\n            maxcnt = cnt\n            maxdig = digit\n\n    l = len(f) % 25\n    if l == 0:\n        start = len(f) - 25\n    else:\n        start = len(f) - l\n    for i in range(start, len(f)):\n        chunk += f[i]\n\n    return 'Last chunk %s; Max is %d for digit %s' % (chunk, maxcnt, maxdig)\n\n\ndef fib(n):\n    a = 0\n    b = 1\n    if n == 0:\n        return a\n    elif n == 1:\n        return b\n    else:\n        for i in range(2,n+1):\n            c = a + b\n            a = b\n            b = c\n        return b"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'around_fib'
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: 5931