An anagram is a word, a phrase, or a sentence formed from another by rearranging its letters. An example of this is "angel", which is an anagram of "glean".

Write a function that receives an array of words, and returns the total number of distinct pairs of anagramic words inside it.

Some examples:

- There are 2 anagrams in the array `["dell", "ledl", "abc", "cba"]`
- There are 7 anagrams in the array `["dell", "ledl", "abc", "cba", "bca", "bac"]`

```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 = '# METHOD ONE ~ list comprehension\n"100 seconds per 1000 runs of Lorem Ipsum"\n# def anagram_counter(s):\n#     return sum([1for i,c in enumerate(s)for w in s[i+1:]if sorted(c)==sorted(w)])\n\n# METHOD TWO ~ standard iteration\n"50 seconds per 1000 runs of Lorem Ipsum"\n#def anagram_counter(words):\n#    anagram_count = 0\n#    for i, current in enumerate(words):#                    FUN FACT:\n#        cenrrtu = sorted(current)\n#        for word in words[i+1:]:\n#            if cenrrtu == sorted(word):#     Lorum Ipsum contains 6,862 anagram matches\n#                anagram_count += 1\n#    return anagram_count\n\n# METHOD THREE ~ comparing sets to counts\n"0.5 seconds per 1000 runs of Lorem Ipsum"\ndef run_down(number):\n    count = 0\n    while number:\n        count += number - 1\n        number -= 1\n    return count\n\ndef anagram_counter(words):\n    sorts = list(\'\'.join(sorted(word)) for word in words)\n    unique = set(sorts)\n    return sum(run_down(sorts.count(word)) for word in unique)\n    \n"""\niterations     _comp_    _iter_    _sets_\n1              0.0990    0.0541    0.0008\n10             1.0113    0.4954    0.0054\n100            9.9280    4.8606    0.0535\n1000         101.2153   50.2576    0.5660\n"""'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'anagram_counter'
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: 5916