PROGRAM
	crypt - encrypt and decrypt standard input and print to standard output
USAGE
	crypt key
DESCRIPTION
	crypt uses a key to encrypt characters coming from the standard input and
	prints the result to standard output. This half addition as a symmetric key
	encryption: what you encrypt with the key is decrypted with the key. It also
	means you can double encrypt by encrypting with one key, then reencrypting
	with a second key.
EXAMPLE
	C:\>echo hello, world | crypt pass | crypt pass
	hello, world