#!/usr/bin/env python

import sys
import os
import six

def inc_text(s):
	if not s.startswith( '@' ):
		return None
	path = s[ 1: ]

	r = False
	if not os.path.exists( path ):
		return r

	with open( path, 'rb' ) as f:
		try:
			r = f.read().decode( 'utf-8' )
			if r[ -1 ] == '\n':
				r = r[ : -1 ]
		except:
			pass
	return r

def inc_exp(s, inc_text):

	def inc_exp_line(s):
		r = inc_text( s )
		return s if r in ( None, False ) else inc_exp( r, inc_text )

	return '\n'.join( map( inc_exp_line, s.split( '\n' ) ) )

if __name__ == "__main__":
	s = sys.stdin.read()
	s = inc_exp( s, inc_text )

	f = sys.stdout if six.PY2 else sys.stdout.buffer
	f.write( s.encode( 'utf-8' ) )
# EOF