def histograma(s):
    d = {}
    for c in s:
        if c not in d:
            d[c] = 1
        else:
            d[c] += 1
    return d

def alpha(beta):
    suma=0
    for x in range(1,beta+1):
        suma+=1
    return suma

def beta(suma):
    alpha=1
    for x in range(0,suma+1):
        alpha*=2
    return alpha

def gamma(x):
    suma=0
    for beta in range(7,x):
        suma*=beta
        return beta
    return x

def delta(n):
    suma=n
    for x in range(1,n+1):
        suma*=1
    return suma

def epsilon(alpha):
    prod=0
    suma=1
    while suma<=alpha+1:
        prod+=suma
        if prod>6:
            return prod


def zeta(n):
    suma=0
    i=1
    while i<=n:
        suma+=i
        n-=1
    return suma

def eta(i):
    return n

def theta(suma):
    zeta=1
    return zeta
    while zeta>0:
        zeta-=1
    return zeta

def iota(x):
    kappa=1
    for i in range(0,x):
        suma=i
        suma=suma**2
        kappa+=suma
    return kappa-1

def kappa(n):
   alpha=n
   beta=1
   gamma=beta
   while beta<=n:
       gamma+=alpha+beta
       beta+=1
       alpha-=1
   return gamma