import sys

output_file = open('output1.txt', 'a')

def get_lines():
	with open(sys.argv[1], 'r') as input_file:
		for line in input_file:
			yield line

for line in get_lines():

	try:
		newline = int(line)

	except ValueError:
		output_file.write(line)
		pass

output_file.close()