# Introduction 

The ragbaby cipher is a substitution cipher that encodes/decodes a text using a keyed alphabet and their position in the plaintext word they are a part of.

To encrypt the text `This is an example.` with the key `cipher`, first construct a keyed alphabet:
```
c       i       p       h       e       r       a       b       d       f       g       j       k       l       m       n       o       q       s       t       u       v       w       x       y       z
```

Then, number the letters in the text as follows:
```
T       h       i       s               i       s               a       n               e       x       a       m       p       l       e       .
1       2       3       4               1       2               1       2               1       2       3       4       5       6       7        
```

To obtain the encoded text, replace each character of the word with the letter in the keyed alphabet the corresponding number of places to the right of it (wrapping if necessary). 
Non-alphabetic characters are preserved to mark word boundaries.

Our ciphertext is then `Urew pu bq rzfsbtj.`

# Task

Wirate functions `encode` and `decode` which accept 2 parameters:
- `text` - string - a text to encode/decode
- `key` -  string - a key

# Notes

- handle lower and upper case in `text` string
- `key` consists of only lowercase characters

```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\nfrom string import ascii_lowercase as alphabet\n\ndef keyed_alphabet(key):\n    char2idx, idx2char = {}, {}\n    for letter in key + alphabet:\n        if letter not in char2idx:\n            char2idx[letter] = len(char2idx)\n            idx2char[len(idx2char)] = letter\n    return char2idx, idx2char\n\ndef ragbaby(mode, text, key):\n    char2idx, idx2char = keyed_alphabet(key)\n    cipher_word = lambda match: ''.join(\n    [str.upper, str.lower][letter.islower()](idx2char[(char2idx[letter.lower()] + idx * mode) % len(alphabet)])\n            for idx, letter in enumerate(match.group(), 1))\n    return re.sub('[{}]+'.format(alphabet), cipher_word, text, flags=re.I)\n\nencode, decode = lambda *args: ragbaby(1, *args), lambda *args: ragbaby(-1, *args)"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'encode'
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: 168694