Suggested problems

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Biological Motivation

Oxycodone is a potent opioid pain medication that works on the opioid receptors in the central nervous system and reduces the feeling of pain by interrupting the way nerves signal pain between the brain and the body. It is mainly used for treating spontaneous bursts of shooting pain, ongoing pain, chronic pain, and cancer-related pain.


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