Https://practice.geeksforgeeks.org/problems/alien-dictionary/1

#1
#2

Consider the case: word1=“abc” and word2=“abcd” then, there should not be any edge. But u are creating an edge in ur code. Try to correct this.

#3
#4

sir still not getting answer

#5

Store in form of number instead of characters because if two different component have edge between a and b ur code will run only in one component.