def binomial_Coeff(n,k):
     
    if k > n : 
       return 0
    if k==0 or k ==n : 
        return 1 
    return binomial_Coeff(n-1,k-1) + binomial_Coeff(n-1,k) 
def binomial_Coeff(n, n2):
    if n2 > n:
        return 0
       
    if n2 == 0 or n2 == n:
        return 1
    return binomial_Coeff(n - 1, n2 - 1) + binomial_Coeff(n - 1, n2)