The input is a conversation between an automated system and a user looking for suggestions for pubs, restaurants and coffee shops in Cambridge. In the dialogue, the user may provide some criteria for the type of place they want such as price range, cuisine, etc. Given such a dialogue, output the price range the user if looking for which can take one of four values: Cheap, Moderate, Expensive and Don't Care. Output cannot be any other value than the four values. Note that if the user asks for the prices of items provided at a pub, restaurant or coffee shop but doesn't mention the price range they are looking for then the correct classification will be Don't Care. If the user does not mention a particular price, the correct classification will be Don't Care.

Example Input: System: 'Thank you for calling the Cambridge Information system. Your call will be recorded for research purposes. You may ask for information about a place to eat, such as a restaurant, a pub, or a cafe. How may I help you?'
User: 'unintelligible'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'unintelligible'
System: 'What kind of price range are you looking for? For example, expensive, or moderate.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'a moderately priced restaurant in a chesterton area'
System: 'What part of town do you have in mind? For example, King's Hedges, or New Chesterton.'
User: 'chesterton'
System: 'Twenty-four, which is in the Chesterton part of town, is an outstanding restaurant. It's in the moderate price range.'
User: 'whats the address'
System: 'Twenty-four is on 24 Cambridge Science Park, Milton Road.'
User: 'whats the phone number'
System: 'The phone number of Twenty-four is 01223395800.'
User: 'thank you good bye'

Example Output: Moderate

Example Input: System: 'Thank you for calling the Cambridge Information system. Your call will be recorded for research purposes. You may ask for information about a place to eat, such as a restaurant, a pub, or a cafe. How may I help you?'
User: 'looking for an expensive indian restaurant'
System: 'Blue Spice is an outstanding restaurant, it serves indian food and it's in the expensive price range.'
User: 'breathing sil'
System: 'Blue Spice is a great restaurant, it serves indian food and it's in the expensive price range.'
User: 'breathing sil'
System: 'Blue Spice is an outstanding restaurant. It serves indian food. It's in the expensive price range.'
User: 'what is the telephone number'
System: 'The phone number of Blue Spice is 01223413337.'
User: 'what is the area breathing'
System: 'Blue Spice is in the Girton part of town.'
User: 'what is the area'
System: 'Blue Spice is in the Girton part of town.'
User: 'thank you good bye'

Example Output: Expensive

Example Input: System: 'Thank you for calling the Cambridge Information system. Your call will be recorded for research purposes. You may ask for information about a place to eat, such as a restaurant, a pub, or a cafe. How may I help you?'
User: 'breathing sil'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'sil'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'sil'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'restaurant in addonbrookes area'
System: 'What type of food would you like? For example, Fastfood, or Vegetarian.'
User: 'breathing sil'
System: 'What type of food would you like? For example, American, Japanese, or Mediterranean.'
User: 're restaurant in the addonbrookes area'
System: 'The Peking Restaurant, which is in the Addenbrooke's part of town, is a great restaurant. It's in the cheap price range.'
User: 'breathing'
System: 'Are you looking for somewhere near a particular venue? For example, King's College, the People's Portraits Exhibition, or Trinity College.'
User: 'cheap'
System: 'The Peking Restaurant is an outstanding restaurant, it's in the Addenbrooke's part of town and it's in the cheap price range.'
User: 'cheap'
System: 'The Peking Restaurant, which is in the Addenbrooke's part of town, is a great restaurant. It's in the cheap price range.'
User: 'breathing sil'
System: 'The Peking Restaurant, which is in the Addenbrooke's part of town, is a great restaurant. It's in the cheap price range.'
User: 'sil'
System: 'What type of food would you like? For example, Indian, International, or Traditional.'
User: 'thank you good bye'

Example Output:
Cheap