# Suggested problems

Aug. 24, 2021, 11:42 a.m. by TramadolUS

## Biological Motivation

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Important Information

Adderall has the potential to become addictive, and it is a drug of abuse. Tell your doctor if you have a history of drug or alcohol abuse. You can [order Adderall overnight][4].

Stimulants have caused strokes, heart attacks, and sudden death in people with high blood pressure, heart disease, or a heart defect.

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Adderall may cause new or worsening psychosis (abnormal thoughts or behavior), especially if you have a history of mental illness, depression, or bipolar disorder.

You may have blood circulation issues, resulting in numbness, pain, or discoloration in your fingers or toes.

## Problem

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

AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC


## Sample Output

20 12 17 21