Given time in 24-hour format, convert it to words. 

```
For example:
13:00 = one o'clock 
13:09 = nine minutes past one 
13:15 = quarter past one 
13:29 = twenty nine minutes past one
13:30 = half past one 
13:31 = twenty nine minutes to two
13:45 = quarter to two 
00:48 = twelve minutes to one
00:08 = eight minutes past midnight
12:00 = twelve o'clock
00:00 = midnight

Note: If minutes == 0, use 'o'clock'. If minutes <= 30, use 'past', and for minutes > 30, use 'to'. 

```

More examples in test cases. Good luck!

```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 = 'NUM = """midnight one two three four five six seven eight nine\n  ten eleven twelve thir_ four_ fif_ six_ seven_ eigh_ nine_\n  twenty""".replace("_", "teen").split()\nfor n in range(1, 10): NUM.append(f"twenty {NUM[n]}")\n\n\ndef solve(time):\n    hh, mm = map(int, time.split(":"))\n    if mm > 30: hh += 1\n    \n    hour = NUM[hh % 12] if hh % 12 else NUM[hh % 24]\n    \n    if   mm ==  0: min = ""\n    elif mm == 15: min = "quarter past "\n    elif mm == 30: min = "half past "\n    elif mm == 45: min = "quarter to "\n    elif 0 < mm < 30: min = f"{NUM[mm]} minute{\'s\' if mm > 1 else \'\'} past "\n    else: min = f"{NUM[60 - mm]} minute{\'s\' if mm < 59 else \'\'} to "\n    \n    return min + hour + (" o\'clock" if mm == 0 and hh > 0 else "")'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'solve'
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: 5816