Driver

def driver(data)

[make_last_name(data[2]).upcase!,decade_digit(data[3]),if_fem(month(data[3]),data[-1]),day(data[3]),data[3].chars.last,initials(data[0],data[1]),"9AA"].join("")
end
def make_last_name str
 return str if str.size==5
 num= "9"*(5-str.size)
  if str.size<5
    "#{str}"+"#{num}"
  end
end
def decade_digit str
   ary= str[-4..-1]
  ary[-2]
end
def month str
  ary=str[3..5]
  case ary
    when  /Jan|Jan\w*/
     "01"
    when /Feb|Feb\w*/
      "02"
    when /Mar|Mar\w*/
      "03"
    when /Apr|Apr\w*/
      "04"
    when /May|May\w*/
      "05"
    when /Jun|Jun\w*/
      "06"
    when /Jul|Jul\w*/
      "07"
    when /Aug|Aug\w*/
      "08"
    when /Sep|Sep\w*/
      "09"
    when /Oct|Oct\w*/
      "10"
    when /Nov|Nov\w*/
      "11"
    when /Dec|Dec\w*/
      "12"
  end

end
def if_fem num,str
  if str=="F" || str== 'f'
   kek= (num[0].to_i+5).to_s<<num[1]
  end
  kek
end
def day str
  str[0..1]
end
def initials str1,str2
  if !str2.empty?
    str1[0]+str2[0]
  else
    str1[0]+"9"
  end

end