We need two person for one side and 1 women for the another side. We select that women in 7 ways. Now that second side people can sit in 7x4! ways. Now for the first side we need two people from the remaining 14. So this can be done in
14
C2 ways and this side people can sit in
4
C2×4! ways. Again the first group may take any of the two sides. So, the total number of ways are 2×7×4!×