this is my first post so be easy on me..

is there a hexagonal key generator inside backtrack?
i want to make a password list with all the possible combination's for 10 character long hexagonal keys
i already have a generator for windows (pwlistgen_v1.8 by sh4d0w) which will do this but its asking for 12tb that's space i don't have.
half the passwords it generates have 4,5,6,7,8,9,10 characters the same next to each other
and so on...
the way i see it it would be highly unlikely that a password would have more than 3 of the same characters in a row,
is there a way to generate a list that does all the passwords but don't write more than 3 characters in a row?
any ideas how much big the list would be after?