Public toilets are an essential part of any urban infrastructure. Writing the letters for public restrooms in English is easy - simply use the letters 'WC,' which stands for 'water closet.' This abbreviation is recognized worldwide and is commonly used in public spaces such as airports, train stations, and shopping centers. In some countries, you may also see the letters 'Loo' or 'Toilet' used to indicate the location of public restrooms. Regardless of the letters used, it is important to ensure that public restrooms are clean, accessible, and well-maintained to promote a healthy and hygienic environment for all users.