Round 2 : Logic, OOPS, Database Using the same digits of a number , find the next highest number Example : For the number 123, the next highest number is 132 and not 231 , 312, etc., Next questions is group anagram strings Example : dog, eat, god, ate, tea output should be [ [dog,god], [eat,ate,tea]] Come with a solution which will reduce time complexity Next question - Model a Airline ticketing system using OOPS principles. Design the database for this Take one use case and explain the flow