Note: This only works if you have a password that starts with A, B, C, or D and if the second letter in the password appears earlier in the alphabet than the fourth letter. If so, switch the second and fourth letters in the password. Use the new password to start at a level one higher than the original.
Level - Password:
Level 1-1 : BBBV
Level 1-2 : BCBT
Level 1-3 : BDBR
Level 1-4 : BGBQ
Level 1-5 : BHBP
Level 2-1 : BJBM
Level 2-2 : BKBL
Level 2-3 : BLBK
Level 2-4 : BMBJ
Level 2-5 : BPBH
Level 3-1 : BQBG
Level 3-2 : BRBD
Level 3-3 : BTBC
Level 3-4 : BVBB
Level 3-5 : BYZZ
Level 4-1 : BZZY
Level 4-4 : CDZR
Level 4-5 : CGZO
Level 5-1 : CHZP
Level 5-2 : CJZM
Level 5-4 : CLZK
Level 5-5 : CMZJ
Level 6-1 : CPZH
Level 6-3 : CRZD
Level 6-4 : HJKR
Level 6-5 : CVZB
Level 7-1 : CYYZ
Level 7-4 : DCYT
Level 7-5 : DDYR
Level 8-1 : DGYQ
Level 8-5 : DLYK
Level 9-1 : DMYJ
Level 9-2 : DPYH
Level 9-3 : QYDL
Level 9-5 : DTYC
Level 10-1 : DVYB
Level 10-2 : DYVZ
Level 10-3 : DZVY
Level 10-4 : VPDP
Level 10-5 : GCVT