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Check whether the given string is a subsequence of the plaintext alphabet.

Example

• For s = "effg" or s = "cdce", the output should be alphabetSubsequence(s) = false

• For s = "ace" or s = "bxz", the output should be alphabetSubsequence(s) = true.

Hints

• size property
• charCodeAt()
• split()

Input/Output

• [execution time limit] 5 seconds (ts)
• [input] string s

Guaranteed constraints:

2 ≤ s.length ≤ 15.

[output] boolean

true if the given string is a subsequence of the alphabet, false otherwise.