There were 2 baby tiger cubs and 1 baby lion cub and a Mother Tiger who needs to cross a bridge before it floods and they are stranded. The Mother Tiger can only carry 1 cub at a time cross the bridge. At no time, can a tiger cub and a lion cub be together or else they will fight. How can the Mother Tiger take all 3 cubs safely across the bridge before it floods and without ever leaving a tiger cub and a lion cub together?