# Task
 John is new to spreadsheets. He is well aware of rows and columns, but he is not comfortable with spreadsheets numbering system.
```
Spreadsheet             Row Column
A1                      R1C1
D5                       R5C4
AA48                    R48C27
BK12                   R12C63```
Since John has a lot of work to do both in row-column and spreadsheet systems, he needs a program that converts cell numbers from one system to another.


# Example

 For `s = "A1"`, the result should be `"R1C1"`.

 For `s = "R48C27"`, the result should be `"AA48"`.
 
- Input/Output


 - `[input]` string `s`

  The position (in spreadsheet or row-column numbering system).

  `Spreadsheet : A1 to CRXO65535`
  
  `Row-Column: R1C1 to R65535C65535`
  
  
 - `[output]` a string

  The position (in the opposite format; if input was in spreadsheet system, the output should be int row-column system, and vise versa).

```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 re import fullmatch, findall\n\n\ndef spreadsheet(s):\n    if fullmatch(\'R\\d+C\\d+\', s):\n        row = findall(\'\\d+\', s)[0]\n        col = findall(\'\\d+\', s)[1]\n        return f"{convert_int(col)}{row}"\n    else:\n        row = findall(\'\\d+\', s)[0]\n        col = findall(\'[A-Z]+\', s)[0]\n        return f"R{row}C{convert_str(col)}"\n\n\ndef convert_int(num, to_base=26, from_base=10):\n    if isinstance(num, str):\n        n = int(num, from_base)\n    else:\n        n = int(num)\n    alphabet = "0ABCDEFGHIJKLMNOPQRSTUVWXYZ"\n    if n <= to_base:\n        return alphabet[n]\n    else:\n        if n % to_base == 0:\n            return convert_int(n // to_base-1, to_base) + alphabet[26]\n        else:\n            return convert_int(n // to_base, to_base) + alphabet[n % to_base]\n\n\ndef convert_str(num):\n    num = list(num)[::-1]\n    answer = 0\n    alphabet = "0ABCDEFGHIJKLMNOPQRSTUVWXYZ"\n\n    for i in range(len(num)):\n        answer += alphabet.index(num[i]) * (26 ** int(i))\n\n    return answer'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'spreadsheet'
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: 37349