What are the seven-character idioms?

Up and down, in a mess, in a mess, too many cooks, falling apart, seven losses and eight benefits, 7788, 7788, 7788, 7788, 7788, 780, seven dead, seven crooked, 7788, 7788, 7788. Seven long and eight short, seven objects and eight short, seven arches and eight upturned, seven up and eight down, seven horizontal and eight vertical, seven steps and eight forks, seven people and eight hooks, seven fishing and eight flourishing, seven pulling and eight pulling, seven bays and eight twisting, seven feet and eight hands, seven sons and eight hooks, seven mouths and eight mouths, seven holes and eight holes, seven injuries and eight injuries.