#!/usr/bin/env python

import sys
import yaml

import empty

def is_ht( s, c ):
	return len( s ) >= 2 and s[ 0 ] == c and s[ -1 ] == c

def from_csv( s ):
	e = empty.new()
	e.in_quote = False
	e.s = ''
	e.lst = [ [] ]

	def flush():
		s = e.s
		e.s = ''
		if is_ht( s, '"' ):
			s = s[ 1 : -1 ]		
		s = s.replace( '""', '"' )
		e.lst[ -1 ].append( s )
		
	def add_c( c ):
		if c == '\r':
			return
		if not e.in_quote and c in ',\n':
			flush()
			if c == '\n':
				e.lst.append( [] )
			return
		e.s += c
		if c == '"':
			e.in_quote = not e.in_quote

	s = s.strip()
	for c in s:
		add_c( c )
	flush()

	return e.lst

def to_csv( lst ):
	def cnv_row( cols ):
		def cnv_col( col ):
			s = str( col )
			if '"' in s:
				s = s.replace( '"', '""' )
			if any( map( lambda c: c in s, '",\n' ) ):
				s = '"' + s + '"'
			return s
		return ','.join( map( cnv_col, cols ) )
	return '\n'.join( map( cnv_row, lst ) )

def from_ul( s ):
	e = empty.new()
	e.lst = [ [] ]
	e.ids = []

	get_spc = lambda s: 1 + get_spc( s[ 1 : ] ) if s and s[ 0 ] == ' ' else 0

	def cnv_nl( s ):
		k = '\\n'
		while k in s:
			i = s.index( k )
			j = i + len( k )
			n = get_spc( s[ j : ] )
			s = s[ : i ] + '\n' + s[ j + n : ]
		return s

	def cnv_qt( s ):
		qts = [ "'", '"' ]
		if any( map( lambda qt: is_ht( s, qt ), qts ) ):
			s = s[ 1 : -1 ]
		return s

	lst = s.strip().replace( '\\\n', '' ).split( '\n' )
	for s in lst:
		n = get_spc( s )
		s = s[ n : ]
		s = cnv_nl( s )
		s = cnv_qt( s )
		if e.ids and n <= e.ids[ -1 ]:
			e.ids = list( filter( lambda v: v < n, e.ids ) )
			e.lst.append( [] )
			e.lst[ -1 ].extend( [ '' ] * len( e.ids ) )
		e.lst[ -1 ].append( s )
		e.ids.append( n )

	return e.lst

def to_ul( lst ):
	buf = []
	for cols in lst:
		dirty = False
		for ( i, col ) in enumerate( cols ):
			col = str( col )
			if not col and not dirty:
				continue
			dirty = True
			if not col:
				col = "''"
			s = col.replace( '\n', '\\n' )
			s = ' ' * ( i * 2 ) + s
			buf.append( s )
	return '\n'.join( buf )

def from_yaml( s ):
	return yaml.load( s )

def to_yaml( lst ):
	return yaml.dump( lst )

def from_raw( s ):
	return eval( s )

def to_raw( lst ):
	return str( lst )

if __name__ == "__main__":
	from_func = from_csv
	to_func = to_ul

	gdic = globals()
	for a in sys.argv[ 1 : ]:
		if a.startswith( 'from_' ) and a in gdic:
			from_func = gdic.get( a )
		elif a.startswith( 'to_' ) and a in gdic:
			to_func = gdic.get( a )

	f = sys.stdin
	s = f.read()
	lst = from_func( s )
	s = to_func( lst )
	print( s )
# EOF