Permutation and combination

5 boys ( $B_1,B_2,B_3,B_4,B_5$ ) and 5 girls ( $G_1, G_2,G_3, G_4,G_5$ ) are to be seated around a round table such that the boys and girls sit alternately and $B_i$ does not sit beside $G_i \forall i \in \{1,2,3,4,5\}$ . If the number of such arrangements is $N$ , submit your answer as the sum of digits of $N$ .