Find the customers who signed up twice

A CRM team in Mumbai wants to merge duplicate customer records. Two records are linked when they have the same email key OR the same name key. Links are transitive: if A matches B and B matches C, all three form one group.

• Email key: trim and lower-case the address and split it at @ into local part and domain. Cut the local part at the first + (everything from the + on is dropped). If the domain is gmail.com or googlemail.com, remove all dots from the local part and use gmail.com as the domain. The key is local@domain.
• Name key: keep only the letters of the name in lower case and sort those letters alphabetically. So Ali Khan and Khan, Ali share a key. The rule is deliberately strict and any anagram counts, even Amir Ali and Mira Ali.

Task: line 1 is N, then N lines of the form id,name,email (ids are unique words without commas, names contain no commas). Print one line for every group with two or more records: the ids separated by single spaces in input order. Print the groups ordered by the input position of their first record. If there are no groups print No duplicates.