import sys
import os

final_print=''
empty_switch=True
counter=0
while(empty_switch):
	for a in range (1, len(sys.argv)):
		empty_switch=False
		if os.path.isfile(sys.argv[a])==False:
			print('Unable to load file' + str(sys.argv[a]))
		else:
			f=open(sys.argv[a])
			lines=f.readlines()
			f.close()
			try:
				add=lines[counter]
				empty_switch=True
			except IndexError:
				add=''
			if a==len(sys.argv):
				add+='\n'
			else:
				add+='\t'
			final_print+=add
		counter+=1