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## Task:

You have to write a function `pattern` which returns the following Pattern(See Examples) upto desired number of rows. 

* Note:`Returning` the pattern is not the same as `Printing` the pattern.

## Parameters:
    
    pattern(        n        ,        y        );
                    ^                 ^         
                    |                 |         
             Term upto which   Number of times  
              Basic Pattern     Basic Pattern   
                should be         should be     
                 created          repeated      
                                 vertically    
    
* Note: `Basic Pattern` means what we created in Complete The Pattern #12 i.e. a `simple X`.

## Rules/Note:

* The pattern should be created using only unit digits.
* If `n < 1` then it should return "" i.e. empty string.
* If `y <= 1` then the basic pattern should not be repeated vertically.
* `The length of each line is same`, and is equal to the length of longest line in the pattern.
* Range of Parameters (for the sake of CW Compiler) :
  + `n ∈ (-∞,50]`
  + `y ∈ (-∞,25]`
* If only one argument is passed then the function `pattern` should run as if `y <= 1`.
* The function `pattern` should work when extra arguments are passed, by ignoring the extra arguments.
   
   
## Examples:

#### Having Two Arguments:

##### pattern(4,3):

        1     1
         2   2 
          3 3  
           4   
          3 3  
         2   2 
        1     1
         2   2 
          3 3  
           4   
          3 3  
         2   2 
        1     1
         2   2 
          3 3  
           4   
          3 3  
         2   2 
        1     1
       
##### pattern(10,2):

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



#### Having Only One Argument:

##### pattern(25):

        1                                               1
         2                                             2 
          3                                           3  
           4                                         4   
            5                                       5    
             6                                     6     
              7                                   7      
               8                                 8       
                9                               9        
                 0                             0         
                  1                           1          
                   2                         2           
                    3                       3            
                     4                     4             
                      5                   5              
                       6                 6               
                        7               7                
                         8             8                 
                          9           9                  
                           0         0                   
                            1       1                    
                             2     2                     
                              3   3                      
                               4 4                       
                                5                        
                               4 4                       
                              3   3                      
                             2     2                     
                            1       1                    
                           0         0                   
                          9           9                  
                         8             8                 
                        7               7                
                       6                 6               
                      5                   5              
                     4                     4             
                    3                       3            
                   2                         2           
                  1                           1          
                 0                             0         
                9                               9        
               8                                 8       
              7                                   7      
             6                                     6     
            5                                       5    
           4                                         4   
          3                                           3  
         2                                             2 
        1                                               1
        
        
>>>LIST OF ALL MY KATAS<<<

```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, y=1, *a):\n    if n < 1: return ''\n    l, y  = 2*n-1, max(1,y)\n    sngl  = ['{}{}{}'.format(x%10, ' '*(l-2*x), x%10 if x!=n else '').center(l) for x in range(1,n+1)]\n    cross = sngl + sngl[:-1][::-1]\n    return '\\n'.join( cross + cross[1:]*(y-1) )"
_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: 5516