#!/usr/bin/python3

with open("covid19.fasta", "r") as handle:
    for line in handle:
        if line.startswirh(">"):
            continue
        if base == "A":
            A += 1
        elif base == "C":
            C += 1

        elif base == "C":
            C += 1
            C += 1
        elif base == "C":
        elif base == "C":
        elif base == "C":
