def not_poor(str1):  
  snot = str1.find('not')  
  sbad = str1.find('poor')  
  
  if sbad > snot:  
    str1 = str1.replace(str1[snot:(sbad+4)], 'good')  
  
  return str1  
print(not_poor('The lyrics is not that poor!')) 