Looks like it has been found... no confirmation on solution yet, but if you re-org the string into 4 lines of 19:
BOHEIYIMIONBYTORRTE
AAIADISPOOARTITTSHA
LNSMKNCANKLAHSNHOOS
TDTHEHONBIIRANOOURT
BALTO AND HIS TEAM HID KEY IN HIS COMPANION BOOK IN A LIBRARY
THAT IS NOT NORTH OR SOUTH OR EAST
BOHEIYIMIONBYTORRTE
AAIADISPOOARTITTSHA
LNSMKNCANKLAHSNHOOS
TDTHEHONBIIRANOOURT
BALTO AND HIS TEAM HID KEY IN HIS COMPANION BOOK IN A LIBRARY
THAT IS NOT NORTH OR SOUTH OR EAST

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