Please read here: http://hashcat.net/wiki/doku.php?id=mask_attack and especially this section: http://hashcat.net/wiki/doku.php?id=mask...m_charsets
You can define 2 custom charsets, first for x, sedond for y.
-1 aei
-2 123
Then you need to *use* this custom charsets in your mask
e.g. -1 aei -2 123 ?1?2?1?2
This implies (for oclHashcat) that the fixed length is 4 and at 1st and 3rd position you want a, e, i and at 2nd and 4th postion 1, 2, 3 to be used
You can define 2 custom charsets, first for x, sedond for y.
-1 aei
-2 123
Then you need to *use* this custom charsets in your mask
e.g. -1 aei -2 123 ?1?2?1?2
This implies (for oclHashcat) that the fixed length is 4 and at 1st and 3rd position you want a, e, i and at 2nd and 4th postion 1, 2, 3 to be used