Find number abc

A lady helps her husband install a new computer.
Once it is completed, she tells him to select a password, selecting a word that he'll always remember.
As the computer asks him to enter it, he looks at his wife and with a macho gesture and a wink in his eye, he types: .....  mypenis.
As he hits 'enter', to validate the selection, his wife collapses with laughter and rolls on the floor in hysteria!!
The computer had replied: TOO SHORT- ACCESS DENIED!