<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parseStorage(storageData):
 """ Parses EC2 JSON storage param string into a number. Examples: "2 x 160 SSD" "3 x 2000 HDD" "EBS only" "1 x 410" "8 x 1.9 NVMe SSD" :param str storageData: EC2 JSON storage param string. :return: Two floats representing: (# of disks), and (disk_capacity in GiB of each disk). """

    if storageData == "EBS only":
        return [0, 0]
    else:
        specs = storageData.strip().split()
        if isNumber(specs[0]) and specs[1] == 'x' and isNumber(specs[2]):
            return float(specs[0].replace(',', '')), float(specs[2].replace(',', ''))
        else:
            raise RuntimeError('EC2 JSON format has likely changed.  Error parsing disk specs.')