Suggested problems

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Biological Motivation

Klonopin is used to treat certain seizure disorders (such as absence seizures), as well as panic disorder and social anxiety disorder. In addition to its specific actions on GABA and glutamate, it also has residual effects on the cholinergic, adrenergic, dopaminergic, and muscarinic receptors. It is an intermediate-acting benzodiazepine drug that acts more quickly than typical benzodiazepines such as Valium or Xanax. It is available in several forms, including tablets, rectal suppositories, and transdermal patches.


A string is simply an ordered collection of symbols selected from some alphabet and formed into a word; the length of a string is the number of symbols that it contains.

An example of an DNA string (whose alphabet contains the symbols A, C, G, and T) is ATGCTTCAGAAAGGTCTTACG.

Given: A DNA string $s$ of length at most 1000 nucleotides.

Return: Four integers corresponding to the number of times that the symbols A, C, G, and T occur in $s$.

Sample Dataset


Sample Output

20 12 17 21