''' 
forma rapita
'''
x=range(1,21)
print x

'''
forma larga
x=1
print "[",
while x<=20:
	if x!=20:
		print str(x)+",",
	else:
		print str(x),
	x=x+1
print "]"
'''

7183db3fcdf96c9003c84a0713204bdb244d05f2
''' 
forma rapita
'''
x=range(1,21)
print x

'''
forma larga
x=1
print "[",
while x<=20:
	if x!=20:
		print str(x)+",",
	else:
		print str(x),
	x=x+1
print "]"
'''
