Suggested problems

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Biological Motivation

This medicine is from the category known as opioid agonists. Opioid agonists are the medicine class that treats mild to severe pain in adults. Buy Tramadol Online works by changing how the brain feels pain. This medicine is similar to chemicals known as endorphins. Endorphins will bind to the parts of cells that receive a certain substance. The receptors decrease the pain signals that the body sends to the brain. Tramadol also decreases the amount of pain the brain thinks you are having.


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