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from collections import Counter

def scramble(s1, s2):
    letters = Counter(s1)
    word = Counter(s2)
    diff = word - letters
    return len(diff) == 0

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def first_non_repeating_letter(string):
    for i in string:
        if(string.lower().count(i.lower())==1):
            return i
    return ""

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def zeros(x):
    i = 5
    count = 0
    while x >= i:
        count += x // i
        i *= 5
    return count

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def removNb(n):
    result=[]
    for a in range(1,n+1):
        for b in range(1,n+1):
            if(a*b==(n*(n+1)/2-a-b)):
                result.append((a,b))
    return result

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def check_palindrome(a):
    return str(a) == str(a)[::-1]

def palindrome_chain_length(n):
    steps=0
    while(check_palindrome(n)!=True):
        n=n+int(str(n)[::-1])
        steps+=1
    return steps

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def is_valid_IP(string):
    if(string==""):
        return False
    string=string.split('.')
    count = 0
    for i in string:
        if(i[0]=="0" and len(i)!=1):
            return False
        elif(i.isdigit()==False):
            return False

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class Calculator(object):
    def evaluate(self, string):
        return round(eval(string), 10)

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import numpy as np

def determinant(matrix):
    return round(np.linalg.det(matrix),3)

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def sort_array(arr):
oddarr=[]

for i in arr:
  if(i%2!=0):
    oddarr.append(i)
    
oddarr=sorted(oddarr)
j=0