Problem: You are given two strings, A and B. Find if there is a substring that appears in both A and B.

Input

The first line of the input will contain a single integer T, the number of test cases.

Then there will be T descriptions of the test cases. Each description contains two lines. The first line contains the string A and the second line contains the string B.

OUTPUT

For each test case, display YES (in a newline), if there is a common substring. Otherwise, display NO.

CONSTRAINTS

All the strings contain only lowercase Latin letters.
1 ≤ T ≤ 10
1 ≤ |A|,|B| ≤ 10^5

SAMPLE INPUT
2
hello
world
hi
world

SAMPLE OUTPUT
YES
NO

Explanation

For the 1st test case, the letter o is common between both strings, hence the answer YES.

For the 2nd test case, hi and world do not have a common substring, hence the answer NO.

Solution (in PYTHON):

Solution:
t=int(raw_input())
for i in range(t):
     ans=0
     noans=0
     s1=raw_input()
     s2=raw_input()
     for j in s1:
          k=0
          for k in s2:
               if k==j:
                  ans+=1
               else:
                  noans+=1
     if(ans>=1):
        print("YES")
     else:
        print("NO")