def get_prev_date(lsd,diff_count):
	lsd = str(lsd)
	diff_count = diff_count
	current_year = lsd[0:4]
	current_month = lsd[4:6]
	current_date = lsd[6:]
	current_date = int(current_date)
	current_year = int(current_year)
	current_month = int(current_month)
	#current_date = current_date-diff
	if current_date < diff_count and current_month>1:
		start_date = 31-abs(current_date-diff_count)
		start_month = current_month-1
		start_year = current_year
	elif current_date <diff_count and current_month ==1:
		start_date = 31-abs(current_date-diff_count)
		start_month = 12
		start_year = current_year-1
	else:
		start_date = current_date-(diff_count)
		start_month = current_month
		start_year = current_year
	if current_month < 10:
		current_month = "0"+str(current_month)
	else:
		current_month = str(current_month)
	if start_month < 10:
		start_month = "0"+str(start_month)
	else:
		start_month = str(start_month)
	if current_date < 10:
		current_date = "0"+str(current_date)
	else:
		current_date = str(current_date)
	if start_date < 10:
		start_date = "0"+str(start_date)
	else:
		start_date = str(start_date)
	start_year = str(start_year)
	l_date = str(start_year)+start_month+str(start_date)
	return l_date