Mysterious
SMIE SIUM SMITURS SMITY
YOURIE YOUSTER TOUR TOUSE
YIREYS ISM'S 'TIES EMORES
TYRTY MOURIMY TIRY MOUROS
MOURIO SERUM MUIS ITES
ISOUT MOIS TOUSTS EUROUS
USSUSY ROSERS USES TROYERY'S
TIMOUS STYM TRUIS OSTERS
TRIST UTERUM SOURIO MISUSERS
ISMUS EMORTIMY YOUSIT SOYT
RESIERMO SETIMOUS YESIER'S SEMS
SURIE SOREMS SEISE ITEMIE
SURS STIES MYOTS MOREMY
SUISERIE OYERY RUERUM SORY
SIUMORY YOUSER OSIT MISEIM
YOUTRUM SUIT TRUMS USSEISY
MITEY SOYES SIMEOS ROURMO
TORES UMIE OUTRUM ROURS
STER TOYISM SOURE YOURMIT
SISUSY SYSOS MIREYS MOUS
'TIUM ROSSR UTER UROUEY
YORETOUS EROUSSY ROUSIE RYOSIEM
ITERMO SUISOS SUMOUT TRUM
TURMIST SOYET OYSOS SISM
ROYERMIS ITERY'S SMUIT TORYITS
What next?