with open('rn6_69_transcript.txt','rb') as gtf, open('rn6_96_tss_from_gtf.txt','wb') as out :
	for line in gtf:
		l = line.strip().split()
		start = int(l[1])
		stop = int(l[2])
		if l[3] == '+':
			tss_start = start - 1
			tss_stop = start
		elif l[3] == '-':
			tss_start = stop - 1
			tss_stop = stop
		else:
			print l[3]
		out.write('\t'.join([l[0], str(tss_start), str(tss_stop), l[3]])+'\n')