I didn't expect people to actually guess!
His on the left, hers on the right.
Hers on the left, his on the right.
His on the left, hers on the right.
Hers on the left, his on the right.
His on the left, hers on the right.
Hers on the left, his on the right.
His on the left, hers on the right.
Hers on the left, his on the right.
His on the left, hers on the right.
How'd you do? ; )