Score : $200$ points

问题陈述

你将得到一个由大写英文字母和数字组成的字符串 $S$。请确定该字符串 $S$ 是否满足以下条件。

• $S$ 是按照以下字符和字符串顺序拼接而成的。
  • 一个大写英文字母
  • 一个长度为 $6$ 的字符串，表示一个介于 $100000$ 到 $999999$（包含两端点）之间的十进制整数
  • 一个大写英文字母

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

You are given a string $S$ consisting of uppercase English letters and digits. Determine whether $S$ satisfies the following condition.

• $S$ is a concatenation of the following characters and string in the order listed.
  • An uppercase English letter
  • A string of length $6$ that is a decimal representation of an integer between $100000$ and $999999$, inclusive
  • An uppercase English letter

Constraints

• $S$ consists of uppercase English letters and digits.
• The length of $S$ is between $1$ and $10$, inclusive.

Input

The input is given from Standard Input in the following format:

$S$

Output

If $S$ satisfies the condition in the problem statement, print Yes; otherwise, print No.

Sample Input 1

Q142857Z

Sample Output 1

Yes

$S$ is a concatenation of Q, 142857, and Z in this order.
Q and Z are uppercase English letters, and 142857 is a string of length $6$ that is a decimal representation of an integer between $100000$ and $999999$, so $S$ satisfies the condition.

Sample Input 2

AB912278C

Sample Output 2

No

AB is not an uppercase English letter, so $S$ does not satisfy the condition.

Sample Input 3

X900000

Sample Output 3

No

The last character of $S$ is not an uppercase English letter, so $S$ does not satisfy the condition.

Sample Input 4

K012345K

Sample Output 4

No

012345 is not a string of length $6$ that is a decimal representation of an integer between $100000$ and $999999$, so $S$ does not satisfy the condition.

update @ 2024/3/10 11:47:57