It is known that the string \(s\) contains only lowercase English characters. Also, the string \(t\) contains lowercase English characters and digit characters. You can replace each digit character of \(t\) by a substring consisting of lowercase English characters. Note that the length of such a substring should be not greater than the digit value.

For example, if string \(t\) = “\(a22fg\)”, then you can replace the two “\(2\)”’s by “\(bc\)” and “\(de\)”, respectively. So \(t\) can be transformed into “\(abcdefg\)”.

Determine if the string \(t\) can be transformed into the string \(s\) or not.

Note

The lengths of the string \(s\) and \(t\) are \(n\) and \(m\), respectively.

Constraints

• \(1 \leq T \leq 1000\)
• \(1 \leq n \leq 1000\)
• \(1 \leq m \leq 1000\)

Input Format

• The first line contains a single integer \(T\) —- the number of test cases.
• For each testcase:

  • The first line contains two integers \(n\), \(m\) —- the lengths of \(s\) and \(t\), respectively.

  • The second line contains a string \(s\) of length \(n\).

  • The third line contains a string \(t\) of length \(m\).

Output Format

• For each Testcase, output "YES" if the string \(t\) can be transformed into the string \(s\). Otherwise, output "NO".