040000 tree 9c92737c29572b11b6dbe123ff1a645028e0f5db	client
040000 tree fea7c31ae686cc37653f13e62ff46a31dd2ed951	echoclient
040000 tree 459667580c7f95f10c47e0c5cf47bab19336ab7c	echoserver
040000 tree 32a8df4ea8263aff6aa10c22d01ae6c90658ea2f	server