f = open('/usr/share/dict/words')
l = f.readlines()

def zlicz_dl(l):
    d = {}
    for i in l:
         n = len(i)
         if n in d:
             d[n] += 1
         else:
             d[n] = 1
    return d

def druk(d):
    nmax = 75
    dzielnik = max(d.values())/nmax
    for key in d:
        print('{}: {}'.format(str(key).rjust(3), '*'*int(d[key]/dzielnik)))

d = zlicz_dl(l)
druk(d)