#!/usr/bin/env python
# -*- coding: latin-1 -*-

import sys
import os
from string import *

curnode = ''
idx_node = 0

lines = sys.stdin.readlines()

gline = []

curnode = ''
curgroup = ( split(lines[0], ' ')[0], [lines[0],] )
i = 1

for line in lines[1:]:
	key = split(line, ' ')[0]
	if key != curgroup[0]:
		gline.append(curgroup)
		curgroup = ( key, [line,] )
	else:
		curgroup[1].append(line)
	
gline.append(curgroup)

for key, lines in gline:
	if len(lines) != 3:
		for line in lines:
			line = replace(line, 'graph ', 'digraph ')
			line = replace(line, '--', '->')
			if find(line, '_isa_') != -1:
				line = split(line, ' ')
				print '%s -> %s [ label="is a" style="dashed"];' % (line[2] , line[0])
			else:
					
				print line
		continue
	try:
		node0 = split(lines[1], ' ')[2]
		label = split(split(lines[0], ' ')[3], '=')[1]
		node1 = split(lines[2], ' ')[2]
	except:
		raise `lines`
	if find(label, '_isa_') != -1:
		print '%s -> %s [ label="ISA" style="dashed"];' % (node0, node1)
	else:
		label = replace(label, '_', ' ')
		
		print "%s -> %s [ label=%s ];" % (node1, node0, label)