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:       It was great meeting you .  
 Person2:Me too .  
 Person1:        Maybe we can meet again sometime ?  
 Person2:Of course , but I'll have to go now . 

Output: informal


Input: Consider Input:  Person1:       Would you like to come over for dinner tonight ?  
 Person2:Sure , but I have to tell you that I've become a vegetarian . I don't eat any kind of meat .  
 Person1:        When did you decide to become a vegetarian ?  
 Person2:I saw a program a few months ago about how animals are raised for human consumption . I haven't been able to eat a single piece of meat since .  
 Person1:        That's great . Do you find that you eat a lot more fruit and vegetables now ?  
 Person2:Definitely . I've also been buying organic fruit and vegetables , which is more expensive , but much better for you because they don't have any pesticides on them .  
 Person1:        You've really turned into a health nut , haven't you ?  
 Person2:I guess you could say that . Eating fruit and vegetables helps keep you healthy . I've lost 5 pounds and I feel great !  
 Person1:        How do you get enough protein in your diet ?  
 Person2:Well , I eat a lot more tofu , beans , nuts and some fish .  
 Person1:        Well , don't worry about dinner . I'll only make vegetarian dishes for you . Do you like sushi ?  
 Person2:I prefer cooked fish to raw fish , but if you really like it , make it .  
 Person1:        How about a spicy tofu and vegetable stir-fry ?  
 Person2:That sounds great . What time should I come over ?  
 Person1:        Dinner will be ready at about 7:30 pm , so you can come over at 7 p . m .  
 Person2:Sounds good . See you there ! 

Output: informal


Input: Consider Input:  Person1:       He has come to life in the end .  
 Person2:Oh , thank God . We all felt frightened by the bad new about him .  
 Person1:        Yes . Fortunately , an ambulance passed in the nick of time , and we got him away to hospital .  
 Person2:Right . Unless , who know what will happen .  
 Person1:        Wish him to be healthy soon . 


Output: informal


