Password generator

I made up a nice password generator for those who want properly secure passwords that are easy to remember. The properties of this password are as follows:

* 31 characters long, consisting of eight three-character 'groups' separated by spaces
* every odd group is a alphabetical group
* every even group is a numeric group
* every even alphabetical group is capitalised
* the middle character in every numeric group is shifted to form a symbol
* the middle character in every alphabetical group is a vowel, while the other two are consonants

These rules are very simple yet allow for the creation of very memorable passwords. All you have to remember for any given password are four syllables, and twelve digits. Then, just use the rules above to convert your password memory into the password. Here are some sample passwords:

gan 1#9 FUZ 5)3 jod 8(3 DEG 0@9
hat 0#7 QEG 0)0 foh 4)4 GIG 2%3
nor 2!2 BIL 2*3 suy 9#7 NOP 8%4
wul 3&2 BOR 5#5 bog 8(9 QIB 6^4
waz 0#8 YEZ 6^0 fof 1)4 NIP 1%9
gox 1^7 JON 9!0 xor 9^1 MED 4$3
hef 5*9 FIW 8$8 ric 2^2 KAW 3*6
boh 2%2 LUT 4^0 wif 7%4 MOB 0!1
yag 1)3 NAY 8@7 xox 1#0 BOV 8&7
hux 1&1 BAB 7$0 foc 7$1 FOJ 3&8
jij 8@9 BUK 1(5 pen 8@7 TEV 1#1
rid 2#4 BAL 0$7 rub 2*1 YOG 3%7
sel 8^5 YET 1$2 cap 3*9 WAB 2(8
hab 3@7 SIQ 2%7 ror 0%1 VAT 3^4
gow 8$4 HOV 5%6 lij 3&2 DOW 9!7
sin 6^7 XIM 8*5 laz 3!0 XUV 6^1
liw 1#3 BOC 8@3 gus 2%9 PUJ 4)3
pal 0)6 WEB 9$3 dig 9!8 SUP 8&6
seb 4&4 FER 1!1 cew 3(9 NEW 6!8
kuz 4*7 FUV 3&3 kam 0#8 XOL 6@1

Find it here: http://jsbin.com/iloqam

Note that the characteristics of the generated passwords themselves greatly reduce the search complexity in case an attacker knows such information.

No silver bullet: the maximum possible complexity for unit length (character) in a password is one which is generated in a completely random fashion (that is, without worrying about memorization issues). On the other hand, lengthy passwords are themselves harder to memorize than shorter ones, so using a 20-character password which is supposedly easier to memorize, but with a strength of a 10-character random one, could actually be harder to keep in mind cache than its shorter counterpart.