# 0204.py

def quadrati ():
  n=0
  while 1:
    yield n*n; n+=1

q=quadrati()
for k in xrange(8): print q.next(),
# 0 1 4 9 16 25 36 49
print

#######################################

def genfatt ():
  f=1; i=2
  while 1: yield f; f*=i; i+=1

fattoriali=genfatt()

for k in xrange(8):
  print fattoriali.next(),
# 1 2 6 24 120 720 5040 40320