Suggested problems

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Biological Motivation

Buy Ambien online as an immediate and extended-release form; the immediate release form begins to take its effects allowing the user to sleep quickly and efficiently. The extended form of this medicine is an ideal choice for people who keep on waking up mid-sleep and cannot get a full night's rest. This version of this medicine slowly dissolves in the body so the user can sleep for a whole night. Whereas the immediate form of this medicine is for those who cannot sleep at night at all, it will begin to provide sleeping effects within hours.


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