[identify the cloud haha preferred] [preferred for the exam]](【认准云哈哈优选】【刷题作业考试首选】)

hot sale: 30 black pens +1 red pen [only sold for one day]](热销：30支黑笔＋1支红笔【只卖一天】) hot sale: 10 black pens +1 red pen [special offer]](热销：10支黑笔＋1支红笔【活动特价】) recommend: 50 black pens +5 red pens [special offer]](推荐：50支黑笔＋5支红笔【超值特惠】) [optional color 50 pcs]](【自选颜色50支】) [optional color 30 pcs]](【自选颜色30支】) [optional color 20 pieces]](【自选颜色20支】) 50 black pens(50支黑笔) 50 blue pens(50支蓝笔) 50 red pens(50支红笔) 30 black pens(30支黑笔) 30 blue pens(30支蓝笔) 30 red pens(30支红笔) 30 black +10 red +10 blue(30黑＋10红＋10蓝) 80 black +10 red +10 blue(80黑＋10红＋10蓝) 90 black +10 red(90黑＋10红) 20 black +5 red +5 blue(20黑色＋5红＋5蓝) 5 black +2 red +3 blue(5黑色＋2红＋3蓝) 50 black +50 red(50黑＋50红) 50 black +50 blue(50黑＋50蓝) 40 black +5 red +5 blue(40黑＋5红＋5蓝) 1 red(1支红色) 20 black pens(20支黑笔) 20 blue pens(20支蓝笔) 20 red pens(20支红笔) 10 black +2 red(10黑色＋2红色) 10 red +2 black(10红色＋2黑色) 10 blue +2 red(10蓝色＋2红色) 1 black +1 red +1 blue(黑色1支＋红色1支＋蓝色1支)