26 Xavier and Yvonne   X x   Y y

The wizard was still missing an X andY.
"I'm foxed! I'll have to axe the whole thing", Zettelwitz groaned.
"It's inexplicable! I've tried x number of times to find someone to change into an X or a Y. I just can't do it!"
"You won't be exerting yourself any more today, anyway", said Phyllis the python with a yawn.
She had wound herself around the wizard to give her friends a break.
The python looked into his eyes to hypnotize him.
"For the rest of today, you will do only useful magic", she commanded.
"Don't tax me with that - I wasn't going to do anything bad anyway", said Zettelwitz, vexed.
"That's the exact truth", agreed Susie and Sylvia Sea-lion.
"Surely you could find lots of people in Persia or France whose names begin with X or Y", Sylvia puzzled.
"I can't change a Mr X and Mrs Y into their first letters just because their first names are Xerxes and Yvonne.
Rule Sixty-Six of the Wizard's Code says that I can only do that if they look like an X and a Y."
"It's a complex problem", said the ibex.
"You should look in Xaxaba for a Xavier with legs that stick out like the bottom half of an X!"
"Or a yak with legs like a Y", joked the hyena.
"Zettelwitz", sighed King Kalinko, "can't you be flexible?
An expert like you doesn't have to find a couple of extra people to exchange for letters!"
"Wait a minute, you're right - it really is extraordinarily easy.
I can conjure up a nice Xavier and a cute Yvonne for you", replied Zettelwitz.
"If you're spinning us a yarn again, we'll exile you to Xanadu", warned the king.
"Your Excellency, I promise not to harm anyone else. No excuses this time . . ."
Zettelwitz lifted his magic wand. They heard the sound of a xylophone, as an X and a Y appear.
That's not all that appeared - suddenly a boy and a girl were standing there looking perplexed.
"Did you come from Xaxaba?" Kalinko asked.
"No", said Xavier. "A moment ago we were in Ysterfontein!"