# A History Lesson

Soundex is an interesting phonetic algorithm developed nearly 100 years ago for indexing names as they are pronounced in English. The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling.

Reference: https://en.wikipedia.org/wiki/Soundex



# Preface

I first read about Soundex over 30 years ago. At the time it seemed to me almost  like  A.I. that you could just type in somebody's name the way it sounded and there was still a pretty good chance it could match the correct person record. That was about the same year as the first "Terminator" movie so it was easy for me to put 2 and 2 together and conclude that Arnie must have had some kind of futuristic Soundex chip in his titanium skull helping him to locate ```Serah Coner```... or was it ```Sarh Connor```... or maybe ```Sayra Cunnarr```...

:-)



# Task

In this Kata you will encode strings using a Soundex variation called "American Soundex" using the following (case insensitive) steps:

* Save the first letter. Remove all occurrences of ```h``` and ```w``` except first letter.
* Replace all consonants (include the first letter) with digits as follows:
 * ```b```, ```f```, ```p```, ```v``` = 1
 * ```c```, ```g```, ```j```, ```k```, ```q```, ```s```, ```x```, ```z``` = 2
 * ```d```, ```t``` = 3
 * ```l``` = 4
 * ```m```, ```n``` = 5
 * ```r``` = 6
* Replace all adjacent same digits with one digit.
* Remove all occurrences of ```a```, ```e```, ```i```, ```o```, ```u```, ```y``` except first letter.
* If first symbol is a digit replace it with letter saved on step 1.
* Append 3 zeros if result contains less than 3 digits. Remove all except first letter and 3 digits after it

## Input

A space separated string of one or more names. E.g.

```Sarah Connor```

## Output

Space separated string of equivalent Soundex codes (the first character of each code must be uppercase). E.g.

```S600 C560```

```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 = "from itertools import groupby,islice\n\ntr=str.maketrans('ABCDEFGIJKLMNOPQRSTUVXYZ','012301202245501262301202','HW')\n\ndef soundex(n):\n    n=n.upper()\n    ws=[]\n    for w in n.split(' '):\n        s=[]\n        s=list(islice((vg[0] for i,vg in enumerate(groupby(w.translate(tr))) if vg[0]!='0' or i==0),4))\n        if s[0]=='0' or s[0]==w[0].translate(tr):\n            s[0]=w[0]\n        else:\n            s.insert(0,w[0])\n        ws.append(''.join(s)[:4].ljust(4,'0'))\n    return ' '.join(ws)\n"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'soundex'
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: 7304