I think my next approach is with hint #2.
I have 170 three letter words that have an 'O' in the middle, 153 of which do not have repeated letters (eg POP). It will take some time to test all of the permutations but it may be good practice for mastermind at the same time.
In case anyone wants to help, or knows one I missed, here are the 153.
BOA
BOD
BOG
BOP
BOS
BOT
BOW
BOX
BOY
COB
COD
COG
COL
CON
COP
COR
COS
COT
COW
COX
COY
COZ
DOC
DOE
DOG
DOL
DOM
DON
DOR
DOS
DOT
DOW
EON
FOB
FOE
FOG
FOH
FON
FOP
FOR
FOU
FOX
FOY
GOA
GOB
GOD
GOR
GOS
GOT
GOX
GOY
HOB
HOD
HOE
HOG
HON
HOP
HOT
HOW
HOY
ION
JOB
JOE
JOG
JOT
JOW
JOY
KOA
KOB
KOI
KOP
KOR
KOS
LOB
LOG
LOP
LOT
LOW
LOX
MOA
MOB
MOC
MOD
MOG
MOL
MON
MOP
MOR
MOS
MOT
MOW
NOB
NOD
NOG
NOH
NOM
NOR
NOS
NOT
NOW
POD
POH
POI
POL
POM
POT
POW
POX
ROB
ROC
ROD
ROE
ROM
ROT
ROW
SOB
SOD
SOL
SOM
SON
SOP
SOT
SOU
SOW
SOX
SOY
TOD
TOE
TOG
TOM
TON
TOP
TOR
TOW
TOY
VOE
VOW
VOX
WOE
WOG
WOK
WON
WOP
WOS
WOT
YOB
YOD
YOK
YOM
YON
YOU
YOW
ZOA
I have 170 three letter words that have an 'O' in the middle, 153 of which do not have repeated letters (eg POP). It will take some time to test all of the permutations but it may be good practice for mastermind at the same time.
In case anyone wants to help, or knows one I missed, here are the 153.
BOA
BOD
BOG
BOP
BOS
BOT
BOW
BOX
BOY
COB
COD
COG
COL
CON
COP
COR
COS
COT
COW
COX
COY
COZ
DOC
DOE
DOG
DOL
DOM
DON
DOR
DOS
DOT
DOW
EON
FOB
FOE
FOG
FOH
FON
FOP
FOR
FOU
FOX
FOY
GOA
GOB
GOD
GOR
GOS
GOT
GOX
GOY
HOB
HOD
HOE
HOG
HON
HOP
HOT
HOW
HOY
ION
JOB
JOE
JOG
JOT
JOW
JOY
KOA
KOB
KOI
KOP
KOR
KOS
LOB
LOG
LOP
LOT
LOW
LOX
MOA
MOB
MOC
MOD
MOG
MOL
MON
MOP
MOR
MOS
MOT
MOW
NOB
NOD
NOG
NOH
NOM
NOR
NOS
NOT
NOW
POD
POH
POI
POL
POM
POT
POW
POX
ROB
ROC
ROD
ROE
ROM
ROT
ROW
SOB
SOD
SOL
SOM
SON
SOP
SOT
SOU
SOW
SOX
SOY
TOD
TOE
TOG
TOM
TON
TOP
TOR
TOW
TOY
VOE
VOW
VOX
WOE
WOG
WOK
WON
WOP
WOS
WOT
YOB
YOD
YOK
YOM
YON
YOU
YOW
ZOA

















