###Task:

You have to write a function **pattern** which returns the following Pattern(See Examples) upto n rows, where n is parameter.

####Rules/Note:
* If the Argument is 0 or a Negative Integer then it should return "" i.e. empty string.
* The length of each line = (2n-1).
* Range of n is (-∞,100]

###Examples:

pattern(5):

        12345
       12345 
      12345  
     12345   
    12345    

pattern(10):

             1234567890
            1234567890 
           1234567890  
          1234567890   
         1234567890    
        1234567890     
       1234567890      
      1234567890       
     1234567890        
    1234567890         

pattern(15):

                  123456789012345
                 123456789012345 
                123456789012345  
               123456789012345   
              123456789012345    
             123456789012345     
            123456789012345      
           123456789012345       
          123456789012345        
         123456789012345         
        123456789012345          
       123456789012345           
      123456789012345            
     123456789012345             
    123456789012345              

pattern(20):

                       12345678901234567890
                      12345678901234567890 
                     12345678901234567890  
                    12345678901234567890   
                   12345678901234567890    
                  12345678901234567890     
                 12345678901234567890      
                12345678901234567890       
               12345678901234567890        
              12345678901234567890         
             12345678901234567890          
            12345678901234567890           
           12345678901234567890            
          12345678901234567890             
         12345678901234567890              
        12345678901234567890               
       12345678901234567890                
      12345678901234567890                 
     12345678901234567890                  
    12345678901234567890

```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 pattern(n):\n    digits = "".join(str(i % 10) for i in range(1, n + 1))\n    spaces = " " * (n - 1)\n    return "\\n".join("{}{}{}".format(spaces[i:], digits, spaces[:i]) for i in range(n))'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'pattern'
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: 6494