def main():
	a = input()
	b = input()
	c = input()

	a_hash = 0
	b_hash = 0
	c_hash = 0

	for i in range(3):
		if(a[2-i] == 'o'):
			a_hash += 2**i
		elif(a[2-i] != ':'):
			print("unknown")
			return
		
		if(b[2-i] == 'o'):
			b_hash += 2**i
		elif(b[2-i] != ':'):
			print("unknown")
			return
		
		if(c[2-i] == 'o'):
			c_hash += 2**i
		elif(c[2-i] != ':'):
			print("unknown")
			return
		
	if(a_hash == 0):
		if(c_hash == 0 and b_hash == 2):
			print(1)
			return
		else:
			print("unknown")
			return
	elif(a_hash == 1):
		if(not c_hash == 4):
			print("unknown")
			return
		elif(b_hash == 2):
			print(3)
			return
		elif(b_hash == 0):
			print(2)
			return
		else:
			print("unknown")
			return
	elif(a_hash == 4):
		if(not c_hash == 1):
			print("unknown")
			return
		elif(b_hash == 2):
			print(3)
			return
		elif(b_hash == 0):
			print(2)
			return
		else:
			print("unknown")
			return
	elif(a_hash == 5):
		if(a_hash == b_hash == c_hash):
			print(6)
			return
		elif(a_hash == c_hash and b_hash == 2):
			print(5)
			return
		elif(a_hash == c_hash and b_hash == 0):
			print(5)
			return
		else:
			print("unknown")
			return
	elif(a_hash == 7):
		if(a_hash == c_hash and b_hash == 0):
			print(6)
			return
		else:
			print("unknown")
			return
	else:
		print("unknown")
		return

main()