Rj Geraci
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The more I thought about this, the more I thinkrealized that it isn't right. Maybe it will help someone else though.

Given that:

• 'w' can never follow an 's'.

• 'm' and 'w' are considered matching (they're just upside down!).

• '0' means there is no such letter, or adding no letters is sufficient.

Then:

What letter from the set "b d f h m s w" when added to the front makes the front and back letters match?

fsmss → s

fsmss → s (sfsmss)

wsffs → 0

wsffs → 0 (since a w can not follow an s there is no letter)

fwmhdhdbfw → m

fwmhdhdbfw → m (mfwmhdhdbfw)

bsmhb → 0 or b

bsmhb → 0 or b (Adding no letters is fine here, but if you add a b you still match.

dbmhsm → w

dbmhsm → w (wdbmhsm)

fdhdbmhwmh → ?

h (hfdhdbmhwmh)

bmhsmhwfwdh → ?

h (hbmhsmhwfwdh)

smhdfwsfdbmh → ?

h (hsmhdfwsfdbmh)

Rj Geraci
• 517
• 2
• 9

Given that:

'w' can never follow an 's' 'm' and 'w' are considered matching (they're just upside down!) '0' means there is no such letter, or adding no letters is sufficient.

• 'w' can never follow an 's'.

• 'm' and 'w' are considered matching (they're just upside down!).

• '0' means there is no such letter, or adding no letters is sufficient.

Then:

What letter from the set "b d f h m s w" when added to the front makes the front and back letters match?

fsmss → s

fsmss → s (sfsmss)

wsffs → 0

wsffs → 0 (since a w can not follow an s there is no letter)

fwmhdhdbfw → m

fwmhdhdbfw → m (mfwmhdhdbfw)

bsmhb → 0 or b

bsmhb → 0 or b (Adding no letters is fine here, but if you add a b you still match.

dbmhsm → w

dbmhsm → w (wdbmhsm)

fdhdbmhwmh → ?

h (hfdhdbmhwmh)

bmhsmhwfwdh → ?

h (hbmhsmhwfwdh)

smhdfwsfdbmh → ?

h (hsmhdfwsfdbmh)

Rj Geraci
• 517
• 2
• 9

Given that:

'w' can never follow an 's' 'm' and 'w' are considered matching (they're just upside down!) '0' means there is no such letter, or adding no letters is sufficient.

Then:

What letter from the set "b d f h m s w" when added to the front makes the front and back letters match?

fsmss → s

fsmss → s (sfsmss)

wsffs → 0

wsffs → 0 (since a w can not follow an s there is no letter)

fwmhdhdbfw → m

fwmhdhdbfw → m (mfwmhdhdbfw)

bsmhb → 0 or b

bsmhb → 0 or b (Adding no letters is fine here, but if you add a b you still match.

dbmhsm → w

dbmhsm → w (wdbmhsm)