# Matty mouse and Barry the bear

Matty, the math mouse, had fun playing Mastermind in the Cool™ Club, but he has worked up a hankering for some honey. So our adventurous arithmetist ventured to the local bee hive. Only to find it missing!

Startled, he looked around and saw a trail of dirt mixed drippings leading to a big cave. At the cave, there was a befuddled looking bear. Matty tried to sneak in but the bear noticed him.

"Hello little mouse, are you trying to steal my hard earned honey?", Barry the bear scowled.
"Mayhaps," muttered Matty, the math mouse, meekly.
"Oh, I am willing to share if you ask... and help me."
"Okay," Matty mumbled, looking at the heap of honeyed honeycomb.
"Burt, my bully brother, keeps teasin' me cause I can't figure out his puzzle."
"Do tell."
"Well he likes to yell sentences at me and laughs at me when I can find any pattern."
"Can I hear some examples?"

"YES GRACE CAN YOU GO", he said but when I asked "NO GRACE CAN'T GO", he laughed and said that didn't fit.
"ZOO CANOE MOO", he said. Then he said that "RHINO CANOE TOO?" did not work.
"MARS MOON VENUS SUN" fit but "PLUTO" didn't.
He said, "CAVERNOUS SUPERNOVA UNCOVERS UNSAVORY SUPREMACY" after which I just gave up and said "NO". And then he said "Ha! You finally found one that works."

So can you figure out what the pattern is?

Works:
"YES GRACE CAN YOU GO",
"ZOO CANOE MOO",
"MARS MOON VENUS SUN",
"CAVERNOUS SUPERNOVA UNCOVERS UNSAVORY SUPREMACY",
"NO"
"MUMMY"
"MUSE SONG"
"A MAGE RUSE"

Does not work:
"NO GRACE CAN'T GO",
"RHINO CANOE TOO?",
"PLUTO"
"HI SORRY"
"KNOW"
"BARELY BARRY"
"ZOO KAYAK MOO"
"MUSICIAN'S PIECE"
"A WIZARD'S TRICK"

Hint:

If there is anything I did with this puzzle that strikes you as peculiar mayhaps you could undo it.

• do we need to calculate? assign numbers to letters in some way?
– JLee
Commented Jul 28, 2015 at 22:30
• Matty the math mouse is not especially equipped for this puzzle. Commented Jul 28, 2015 at 23:27
• I have made some extensive edits to make the puzzle more grammatically accurate. If my edits have somehow misrepresented your intentions, please feel free to let me know. Commented Jul 29, 2015 at 6:31
• day-3, still searching for the solution ... Commented Jul 31, 2015 at 7:18
• @Therandomguy Don't worry, I'm pretty sire you will find it! Commented Jul 31, 2015 at 7:21

I'm going with this: a sentence works if

writing it out in lower case, there are no letters with ascenders (like l, t, h, k).

There's one little thing that still bothers me though, and it's

"musician's piece", which doesn't technically have any ascenders, but I guess that an apostrophe is still something above the mean line.

Thanks to @Aioros who almost solved the puzzle. Here is the solution :

Every sentence that is 1 high when it is written in lower-case, excluding letters with descenders.