Here are all the level codes: 
    01 There isn't one 
    02 IKHNDHBCCX 
    03 OJNLLCEDCX
    04 JNLLCMOECQ 
    05 NDHBAKLFCW 
    06 DHBMKNNGCV 
    07 HBANLNDHCL 
    08 BINNLLHICM 
    09 BEKHMLHJCR 
    10 MJHMLHBKCJ 
    11 OHODHBALCN 
    12 HMLHBMOMCQ 
    13 OLLCEKNNCS
    14 LLCMKNOOCL
    15 HBANLMLPCK 
    16 BMNNODHQCT 
    17 BAJJLNHBDY 
    18 IKHLNHBCDQ 
    19 NHLNHBADDM 
    20 JLNHBINEDX 
    21 NFHBAKLFDJ 
    22 NHBIKLLGDY 
    23 LCEONNNHDS
    24 BINLNFHIDX 
    25 BAKJMFHJDK 
    26 IJHMNHBKDY 
    27 OHOFHBALDQ 
    28 JMNHBINMDQ 
    29 ONLCEKNNDV
    30 NLCMKNOODO
    31 HBENLOFPDL 
    32 BMOLMNHQDL 
    33 BEKHLLIBEL 
    34 IKHLDIBCEY 
    35 OJNDIBADEJ 
    36 JLLIBINEEX 
    37 LLIBAJNFEQ 
    38 LIBMKLLGEM 
    39 IBEOLLLHEJ 
    40 BIOLLLIIEO 
    41 BEKHODIJEO 
    42 MKHMLIBKEN 
    43 NJODIBALER 
    44 HODIBMNMEM 
    45 OLMCEKNNEV
    46 LMCMKNOOEO
    47 IBANNMLPEP 
    48 BMNNODIQEW 
    49 BEKJNFIBFK 
    50 IJJLNIBCFU 
    51 NJLNIBADFR
    52 JLNIBINEFK 
    53 LNIBEKLFFW 
    54 FIBIKNNGFX 
    55 IBENNNFHFX 
    56 BMOLLNIIFV 
    57 BAKHMNIJFT 
    58 MKJONMCKFJ
    59 OJONMCELFW
    60 HMNIBMOMFW