You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.

Input: Consider Input:  Person1:       I'm reading an interesting report on Mars . 
 Person2:Oh , what does it say ? Does it say water could still exist under the surface of Mars ? 
 Person1:        Absolutely ! It says there is water on Mars buried beneath the surface . It's just a matter of how deep it is . 
 Person2:Then could the soil on Mars somehow be fertile enough to Groh simple plants ? 
 Person1:        The soil would need quite a bit of fertilizer to grow anything . And it would need to be protected from the UV radiation . 
 Person2:Actually , we are doing a project in school that involves landing a ship and staying on Mars for an extended period of time . Does NASA have any type of portable habitats that could be used to stay on the planet ? 
 Person1:        I'm not sure NASA has built any portable habitats for extended stays on Mars , but they have looked at various designs . 
 Person2:One of the most exciting things about Mars is that there could have bean life on it . What are your personal opinions on the life on Mars theory ? 
 Person1:        Well , I'm not really an expert in this area , but my understanding is that anything is possible . It's just that it is so hard to determine what went on 4.5 billion years ago . 
 Person2:But maybe there is a chance of gradually improving the surface and atmosphere of Mars so it may be inhabitable by humans . 
 Person1:        I'm skeptical . Mars is made of rocks containing silicon , iron , and various minerals . It also has an atmosphere of carbon dioxide . It is so different from what we have on earth , you know . 
 Person2:I'd still like to hope that some day we could set up a human colony there . 
 Person1:        But there are still other big problems we need to solve such as prolonged weightlessness , food storage , and a series of physiological effects . 

Output: formal


Input: Consider Input:  Person1:       Thank you for showing me your offices , Mr . Becker . I can see why Washington bureaucrats enjoy their jobs . 
 Person2:Why do you say that ? 
 Person1:        The city is beautiful , the off ... , the offices are modern and comfortable , and the work is so interesting . 
 Person2:Many people work for the federal government their entire adult lives . Government service can be a rewarding and secure career . 
 Person1:        Do you mean financially rewarding ? 
 Person2:Well , many positions pay salaries that are comparable to those in private industries . 
 Person1:        I ’ Ve always thought that most bureaucrats are lazy . 
 Person2:Sometimes that ’ s true , but not usually . Most feds are honest , hard-working professionals . It ’ s hard to keep highly trained people , so the pay and working conditions have to be attractive . 
 Person1:        How much do you make ? 
 Person2:I ’ m a GS - 15 . That ’ s high on the scale of workers , but even a GS - 1 is paid a living wage . 

Output: informal


Input: Consider Input:  Person1:       What do you think of the way people use and treat animals ?  
 Person2:I think most people treat animals well , but we are often cruel to animals . When we raise animals for food , the conditions they live in are often poor .  
 Person1:        Perhaps people should stop eating animals . We could grow more crops .  
 Person2:What would you do with all the animals ? You couldn ’ t just let them go . Besides , some people would still hunt them . Meat has become an integral part of our diet .  
 Person1:        We could provide them with better conditions anyway . We should certainly try to improve the conditions at zoos . We should try to recreate the natural conditions as much as possible .  
 Person2:That ’ s true . I think zoo are a good idea , because they allow people to get close to animals . I think it ’ s good for kids to see wild animals .  
 Person1:        I agree . I ’ m an adult and I love going to the zoo . I don ’ t like animals experiments though . I believe that we can do tests in other ways .  
 Person2:I read that the number of animals being used in experiments is falling dramatically as new techniques are being introduced .  
 Person1:        That ’ s good news . The good thing is that most people treat their pets well .  
 Person2:Sometimes you read about people who have been cruel to pets or other animals , but those stories are rare .  
 Person1:        Have you every given money to any of the charities that take care of animals .  
 Person2:Yes , I have . They do an excellent job . 


Output: informal


