>When no more interesting kata can be resolved, I just choose to create the new kata, to solve their own, to enjoy the process  --myjinxin2015 said

# Description:
 Give you two number `m` and `n`(two positive integer, m < n), make a triangle pattern with number sequence `m to n`. The order is clockwise, starting from the top corner, like this:
 
```
 When m=1 n=10  triangle is:
    1
   9 2
  8 0 3
 7 6 5 4
```
 Note: The pattern only uses the last digit of each number; Each row separated by "\n"; Each digit separated by a space; Left side may need pad some spaces, but don't pad the right side; If `m to n` can not make the triangle, return `""`.
  
# Some examples:

```
makeTriangle(1,3) should return:
 1
3 2

makeTriangle(6,20) should return: 

    6
   7 7
  6 8 8
 5 0 9 9
4 3 2 1 0

makeTriangle(1,12) should return ""
 
```

```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 make_triangle(n,m):\n    layers = layer(m-n+1)\n    if layers == False:\n        return ""\n    board = []\n    for i in range(layers):\n        board.append([""]*(i+1))\n    triangle = make(n%10,board,0,0,len(board))\n    return tri_print(triangle)\n    \ndef layer(n):\n    a = 0\n    layer = 0\n    for i in range(1,n):\n        a+= i\n        layer += 1\n        if a == n:\n            return layer\n        elif a > n:\n            return False\n        else:\n            continue\ndef tri_print(board):\n    sentence = ""\n    for i in range(len(board)):\n        sentence += " "*(len(board)-1-i)\n        for j in range(len(board[i])):\n            sentence+= str(board[i][j]) + " "\n        sentence = sentence[:-1] + "\\n"\n    return sentence[:-1]\n    \n    \ndef make(n,board,row,col,x):\n    for i in range(row,x):\n        if board[i][col] == "":\n            board[i][col] = n\n            if n == 9:\n                n = 0\n            else:\n                n+=1\n        col +=1\n    for j in range(x-1,-1,-1):\n        if board[x-1][j] == "" :\n            board[x-1][j] = n\n            n_col = j\n            if n == 9:\n                n = 0\n            else:\n                n+=1\n    if check(board):\n        return board\n    for z in range(x-1,row,-1):\n        if board[z][n_col] == "":\n            board[z][n_col] = n\n            rw,cl = z,n_col\n            if n == 9:\n                n = 0\n            else:\n                n+=1\n                \n    if not check(board):\n        return make(n,board,rw,cl,x-1)\n    return board\n\ndef check(board):\n    for i in board:\n        for j in i:\n            if j == "" :\n                return False\n    return True'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'make_triangle'
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: 5626