FIrst comes A.
Then, B.
Then again A,
Then B, you see.

New! A C.
Matched by a D.
If possible, again a C.
And another D, you see.

Now, start with an E!!
Followed by F!
Repeat wtih an E
Also followed by F.

Then march on the G
With H right after.
Another G
(ignoring the laughter).

And so in pairs,
And couplets marching,
Poetry, much like laundry
In need of starching.