C1111133313331323223313331333133313331333131211113313331211113313232322121   >>    C111113331333132322331333133313331333133313121111331333121111331323232212   <<    C1111133313331323223313331333133313331333131211113313331211113313232322123   >>      C1111133313331323223313331333133313331333131211113313331211113313232322122   >>