Mysterious
TRIO OYSOUT RUSSU SOUT
USSY SURMO SOUST TURTIS
SUMOUT STIS SUISTER TRISO
TYRTIR EROUTES TOUSIS MORTIR
SIMORY TOURMO MISM UMITES
OSIES MOIS EROURS ISOR
SURS SIMEOURT SUISUSE REMS
MISUS REISE SERYIST SOURT
OUTI OYERI SOREMOUS ITER
MOSIE STYM RIMERYITE TISSURTIR
OUTERY OYER'S OSIE SYSOMERS
MOUS STOUS TRIE SMIR
USERY MUSES OUTEY EMOUE
RIMOIS YORY USES UMIS
MITUM OSTY SOUSE REMI
STERISY SRUMORY MISERIE STOUTI
RYOTIS SMUS OUSTIMY OSTER
OREYS SUIT SIUMORY TOYERY
TRUIT SMISUS SMUISE TOUTER
SOUSES RIMER OUSE MIRS
USSETY TOUS ETYMIT SYSOS
TOUTERY TURETY RIT'S MITERIS
OYET STRE MOURY STIMOIS
SUMOUS UTER ROSSOS RITE
EMISTIS YOURY SOUSS YOURMISM
What next?