import random

class Sequence:
    def generate(length, alphabet):
        AllSeq = []
        for j in range(length):
            number = random.randint(0,len(alphabet)-1)
            AllSeq.append(alphabet[number])
        return AllSeq

    def Dictionary(Seq):
        SequenceOfNucleotides = []
        CountA = 0
        CountC = 0
        CountT = 0
        CountG = 0
        for j in range(len(Seq)):
            if(Seq[j] == 'A'):
                CountA = CountA + 1
            if(Seq[j] == 'C'):
                CountC = CountC + 1
            if(Seq[j] == 'T'):
                CountT = CountT + 1
            if(Seq[j] == 'G'):
                CountG = CountG + 1
        Dictionary = dict(A=0, C=0, T=0, G=0)
        Dictionary['A'] = CountA
        Dictionary['C'] = CountC
        Dictionary['T'] = CountT
        Dictionary['G'] = CountG
        SequenceOfNucleotides.append(Dictionary)
        return SequenceOfNucleotides
    #def getDictionary():


#Рабочая область
Lists = ['A','C','T','G']
Length = int(input('Введите длину последовательности:'))
Seq = Sequence.generate(Length,Lists)
Dictionary = Sequence.Dictionary(Seq)
print(Dictionary)