myString = 'abcde***fghij*dkc**aaa*'

def backspaceFn(myStr):
  finalStr = ""
  startPointer = 0
  delCount = 0
  for i in range(len(myStr)):
    if myStr[i] == '*':
      delCount += 1

      if i == len(myStr)-1:
        endPointer = i - (2*delCount)
        finalStr += myStr[startPointer:endPointer+1]
        return finalStr

    else:
      if delCount != 0:
        endPointer = i - (2*delCount)

        finalStr += myStr[startPointer:endPointer]
        startPointer = i
        lastCheckpoint = i
      delCount = 0
  finalStr += myStr[startPointer:]
  return finalStr

print(backspaceFn(myString))