# Task
 You are given a string `s`. Let's call its substring a group, if all letters in it are adjacent and the same(such as `"aa","bbb","cccc"`..). Let's call the substiring with 2 or more adjacent group a big group(such as `"aabb","bbccc"`...).
 
 Your task is to count the number of `big groups` in the given string.

# Example

 For `s = "ccccoodeffffiiighhhhhhhhhhttttttts"`, the result should be `3`.
 ```
The groups are "cccc", "oo", "ffff", "iii", "hhhhhhhhhh", "ttttttt"
The big groups are "ccccoo", "ffffiii", "hhhhhhhhhhttttttt", 
3 substrings altogether.```

 For `s = "gztxxxxxggggggggggggsssssssbbbbbeeeeeeehhhmmmmmmmitttttttlllllhkppppp"`, the result should be `2`.
 ```
The big groups are :
"xxxxxggggggggggggsssssssbbbbbeeeeeeehhhmmmmmmm"
and 
"tttttttlllll" ```

 For `s = "soooooldieeeeeer"`, the result should be `0`.
 
 There is no `big group` exist.
 
# Input/Output


 - `[input]` string `s`

  A string of lowercase Latin letters.


 - `[output]` an integer

  The number of big groups.

```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 repeat_adjacent(string):\n    a = list(string)\n    b = []\n    if len(a) >= 2:\n        if a[1] ==a[0]:\n            b.append(1)\n        for i in range(2, len(a)):\n            if a[i-1] == a[i] and a[i-1] != a[i-2]:\n                b.append(1)\n            elif a[i-1] != a[i]:\n                b.append(0)\n        c = []\n        if b[0] == 1:\n            c.append(1)\n        for i in range(1, len(b)):\n            if b[i] == 1:\n                c.append(1)\n            else:\n                if b[i-1] == 0:\n                    c.append(0)\n        k = 0\n        for i in range(1, len(c)-1):\n            if c[i] == 1 == c[i-1] and c[i+1] == 0:\n                k += 1\n        if c[len(c)-1] == 1 == c[len(c)-2]:\n            k += 1\n    else:\n        k = 0\n    return k'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'repeat_adjacent'
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: 6502