#!/usr/bin/env python
# indent pyparsing output
# With vim, use set foldmethod=indent
import sys

indentlevel = 0

for line in sys.stdin:
	if line.startswith("Match "):
		sys.stdout.write(" "*indentlevel+line)
		indentlevel += 1
	elif line.startswith("Matched"):
		indentlevel -= 1
		sys.stdout.write(" "*indentlevel+line)
	elif line.startswith("Exception"):
		indentlevel -= 1
		sys.stdout.write(" "*indentlevel+line)
	else:
		sys.stdout.write(" "*indentlevel+line)