import string
 
 text = "a" + text + "a"
 
 x = 0
 
 while x <= len(text) - 9:
 	text1 = text[x:x+9]
 	if text1[0] not in string.uppercase:
 		for y in range(1, 4):
 			if text1[y] not in string.uppercase:
 				x = x+y
 				break
 		else:
 			if text1[4] in string.lowercase:
 				for z in range(5,8):
 					if text1[z] not in string.uppercase:
 						x = x+4
 						break
 				else:
 					if text1[8] not in string.uppercase:
 						print text1[4],
 					x = x+8
 			else:
 				x = x+4
 	else:
 		x = x+1