def f():   s=0   t=1   for i in range(1,6,2):      t=t*i     s=s+t   return s

def f():   s=0   t=0   for i in range(1,6,2):     t=t*i     s=s+t   return s

def f():   s=0   t=1   for i in range(1,6,2):     t=t*i     if i%2==1:       s=s+t   return s

def f():   s=0   t=1   for i in range(1,6):      t=t*i     if i%2==1:       s=s+t   return s