Lang:Python2
Edit12345678910111213141516171819202122n=int(raw_input())for _ in range(n):flg=Trues1=raw_input().split()[0]s2=raw_input().split()[0]to = [None] * 26for i in range(len(s1)):c1=s1[i]c2=s2[i]c=ord(c1)-ord('a')if to[c]==None:to[c]=c2continueif to[c]==c2:continueif to[c]!=c2:flg=Falseif flg:print('YES')else:print('NO')