Teacher:In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Teacher: Now, understand the problem? Solve this instance: PepsiCo is bringing back its aspartame-sweetened Diet Pepsi, and will now offer two versions of Diet Pepsi, in an attempt to stave off falling diet cola sales. Photo: PepsiCo. 
  
 PepsiCo Inc. spent two years surveying consumers, conducting taste tests, and tinkering with soft drink recipes in order to fix Diet Pepsi, only to find it had completely misread what its customers wanted. 
  
 Less than a year after launching its new Diet Pepsi with sucralose—and abandoning the controversial sweetener aspartame—PepsiCo has made an about-face. On Monday, after plummeting sales and howls of protest from the diet soda’s devotees, the company announced it will bring back Diet Pepsi with aspartame in September. 
  
 ... ||||| NEW YORK (AP) — PepsiCo is creating a new diet beverage for fans of aspartame less than a year after pulling the artificial sweetener as part of a marketing move over safety concerns. 
  
 The sweetener had been linked to cancer in lab mice and industry executives blamed the decline in sales on concerns people have about aspartame. The removal of the sweetener tested the theory that it was to blame for fleeing customers. But, the move seems to have been a misstep, with consumers dissatisfied over the change in flavor without the sweetener. 
  
 The company will start selling the new Diet Pepsi Classic Sweetener Blend this fall, which will contain aspartame in its formula. But, Diet Pepsi will continue to be sweetened without aspartame. 
  
 Meanwhile, Pepsi MAX will be re-introduced to U.S. consumers as Pepsi Zero Sugar and will still contain aspartame. 
  
 The changes were first reported by the publication Beverage Digest and later confirmed by PepsiCo. 
  
 "Consumers want choice in diet colas, so we're refreshing our U.S. lineup to provide three options that meet differing needs and taste preferences," PepsiCo said. 
  
 When the company removed aspartame from products in August, it cited the move as customer driven. Senior vice president Seth Kaufman, at the time, said that it was the "No. 1 thing" customers had been calling about. Several years ago, rival Coca-Cola Co. tested ads in select newspapers defending the safety of the sweetener. 
  
 Shares of PepsiCo Inc. slipped 2 cents to $101.96 amid a broad market sell-off. Its shares are up more than 7 percent over the past year. |||||
Student:
PepsiCo is creating a new diet beverage for fans of aspartame less than a year after pulling the artificial sweetener as part of a marketing move over safety concerns. The sweetener had been linked to cancer in lab mice, and industry executives blamed the decline in sales on concerns people have about aspartame. The August 2015 removal of the sweetener tested the theory that it was to blame for fleeing customers. But the move seems to have been a misstep, with the sales drop only "accelerating," the Wall Street Journal reports. The company will in September start selling the new Diet Pepsi labeled as "Classic Sweetener Blend," which will contain aspartame in its formula. Diet Pepsi will continue to be sweetened with sucralose. Meanwhile, Pepsi MAX will be re-introduced to US consumers as Pepsi Zero Sugar and will still contain aspartame, reports the AP. The Journal sees that move as an attempt to mirror Coca-Cola Zero, a diet brand whose US volumes fell 3.3% in Q1 of 2016—to Diet Coke's 5.7% and Diet Pepsi's 10.6%. "Consumers want choice in diet colas, so we're refreshing our US lineup to provide three options that meet differing needs and taste preferences," PepsiCo said. As for choice, the Journal cites a March survey that found 42% of Americans avoid aspartame, but a growing 35% feel the same about sucralose.