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 a length 21 DNA string (whose alphabet contains the
symbols 'A', 'C', 'G', and 'T') is "ATGCTTCAGAAAGGTCTTACG."

Given: A DNA string s

of length at most 1000 nt.

Return: Four integers (separated by spaces) counting the respective number of times that the symbols 'A', 'C', 'G', and 'T'
occur in s

Sample Dataset

1	AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC

Sample Output

1	20 12 17 21

有人能帮我在Mac上为python3编写代码吗？对不起，我完全不习惯Python

相当容易。

计数器('T'：21，'A'：20，'G'：17，'C'：12)