Given two strings, determine if they share a common substring. A substring may be as small as one character.
These share the common substring .
These do not share a substring.
Complete the function twoStrings in the editor below.
twoStrings has the following parameter(s):
The first line contains a single integer , the number of test cases.
The following pairs of lines are as follows:
For each pair of strings, return YES or NO.
We have pairs to check: