Proper Acronym

By Kay Akashi

Problem Statement

Kay is struggling with memorising the medical terms he learnt at his clinical workshop. Now he has to remember the term that consists of $n$ words. To facilitate memorisation, Kay generated an acronym of the term, which is given as $s$. Check if $s$ is really a proper acronym of the term.

Note that, acronym is an abbreviation formed from the initial letters of other words and pronounced as a word.

Constraints

$1 \leq n \leq 10$. The length of each word in the medical term never exceeds $10$. It is guaranteed that the initial letter of each word is capitalised.

Input

The first line of input contains an integer, $n$. The second line of input contains $n$ words which compose a name of the medical term. The third line of input conatins a though-to-be proper acronym, $s$.

Output

If $s$ is a proper acronym, output "Yes". Otherwise, output "No".

Examples

3
Acute Mountain Sickness
AMS

Yes

3
Computerised Axial Tomography
DOG

No