#!/usr/bin/env python2.6
""" 
Input is Excel-style CSV.  Either stdin or filename.
Output is honest-to-goodness tsv: no quoting or any \\n\\r\\t.
"""
 
from __future__ import print_function
import csv, sys
 
warning_count=0
warning_max = 50
def warning(s):
  global warning_count
  warning_count += 1
  if warning_count > warning_max: return
  print("WARNING:", s,  file=sys.stderr)
 
 
def cell_text_clean(text):
  s = text
  #s = text.encode("utf-8")
  if "\t" in s: warning("Clobbering embedded tab")
  if "\n" in s: warning("Clobbering embedded newline")
  if "\r" in s: warning("Clobbering embedded carriage return")
  s = s.replace("\t"," ").replace("\n"," ").replace("\r"," ")
  return s
 
def clean_row(row):
  return [cell_text_clean(x) for x in row]
  #return [x.replace("\n"," ").replace("\t"," ").replace("\r"," ") for x in row]
  #print row
  #return [x.encode('utf-8').replace("\n"," ").replace("\t"," ").replace("\r"," ") for x in row]
  #return [x.replace("\n"," ").replace("\t"," ").replace("\r"," ").encode('utf-8') for x in row]
 
args = sys.argv[:]
args.pop(0)
if len(args)==1:
  reader = csv.reader(open(args[0]))
elif len(args) > 1:
  raise Exception("No support for multiple files yet")
  # could try to enforce conformity, or meld them together, etc.
elif not sys.stdin.isatty():
  reader = csv.reader(sys.stdin)
else:
  print(__doc__.strip())
  sys.exit(1)
 
#header = reader.next()
#print "\t".join(clean_row(header))
 
#print(sys.stdout.encoding)
#sys.exit(0)
 
for row in reader:
  #print "\t".join(clean_row(row))
  print(*clean_row(row), sep="\t")