There is no DES mode call DES-EEE1. It does not exist.
The following are the correct modes for triple-DES (3DES):
DES-EEE3 uses three keys for encryption and the data is encrypted, encrypted, encrypted; DES-EDE3 uses three keys and encrypts, decrypts and encrypts data.
DES-EEE2 and DES-EDE2 are the same as the previous modes, but the first and third operations use the same key.
Reference(s) used for this question: Shon Harris, CISSP All In One (AIO) book, 6th edition , page 808 and Official ISC2 Guide to the CISSP CBK, 2nd Edition (2010) , page 344-345