CF1800A.Is It a Cat?

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题目描述

You were walking down the street and heard a sound. The sound was described by the string $s$ consisting of lowercase and uppercase Latin characters. Now you want to find out if the sound was a cat meowing.

For the sound to be a meowing, the string can only contain the letters 'm', 'e', 'o' and 'w', in either uppercase or lowercase. Also:

string must start with non-empty sequence consisting only of characters 'm' or 'M'
it must be immediately followed by non-empty sequence consisting only of characters 'e' or 'E'
it must be immediately followed by non-empty sequence consisting only of characters 'o' or 'O'
it must be immediately followed by non-empty sequence consisting only of characters 'w' or 'W', this sequence ends the string, after it immediately comes the string end

For example, strings "meow", "mmmEeOWww", "MeOooOw" describe a meowing, but strings "Mweo", "MeO", "moew", "MmEW", "meowmeow" do not.

Determine whether the sound you heard was a cat meowing or something else.

输入格式

The first line of input data contains a single integer $t$ ( $1 \le t \le 10^4$ ) — the number of test cases.

The description of the test cases follows.

The first line of each test case contains an integer $n$ ( $1 \le n \le 50$ ) — the length of the string describing the sound.

The second line of each test case contains a string $s$ of $n$ characters. The string describes the sound you heard and consists only of lowercase and uppercase Latin letters.

输出格式

For each test case, output on a separate line:

YES if the sound was a cat meowing;
NO otherwise.

You can output YES and NO in any case (for example, strings yEs, yes, Yes and YES will be recognized as positive response).

输入输出样例

输入#1

7
4
meOw
14
mMmeoOoWWWwwwW
3
mew
7
MmeEeUw
4
MEOW
6
MmyaVW
5
meowA

输出#1

YES
YES
NO
NO
YES
NO
NO

说明/提示

In the first test case, the string consists of a sequence of characters 'm', 'e', 'O', 'w', which satisfies the definition of meowing.

In the second test case, the string consists of a sequence of $3$ characters 'm' and 'M', one 'e', a sequence of $3$ characters 'o' and 'O' and a sequence of $7$ characters 'w' and 'W', which satisfies the definition of meowing.

In the third test case, the string does not describe a meowing because it lacks a sequence of 'o' or 'O' characters between 'e' and 'w'.

In the fourth test case, the string contains the character 'U', so it does not describe a meowing.

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