Help me in solving NAME2 problem

help
,
1

My issue

how to solve this

My code

n=int(input())
for i in range (0,n):
    k=0
    x=list(map(str,input().split()))
    y=""
    y=x[0]+x[1]
    y=set(y)
    print(y)

Problem Link: Your Name is Mine Practice Coding Problem