Men are preferred, with 4 * 3 * 2 * 1 = 24 kinds.

For all kinds of men waiting in line (clockwise)

___A

C_____D

__E__B

There are two kinds of women in man A.

But once a is in line, things will be solved.

If a is between CE.

Then b must be between AD.

C is between be

D is between CA

E is between BD

If a is between BD, the same is true.

therefore

24*2=48