Develop a REGEX maker

Goal: We will develop a system as below: Create Regular Expression based on character strings of URL of web site. Comparing multiple URLs which shared common part, then automatically create Regular Expression from the difference. Create GUI to input character strings of URL . This system is composed by HTML and JavaScript file, STEP1 To create a tool which has simple GUI. Automatically create Regex, when INPUT is inserted. (The purpose of this STEP1 is to share the definition of conversion logic between you and us.) STEP2 To impart functions which displays web site in window. Once put a button, URL which is currently displayed in INPUT box would be inserted. Budget: 60000yen Milestone1 starter 10000yen Milestone2 complete step1 20000yen Milestone3 complete step2 30000yen Deadline: Completion of step1 is end in a few days. Please let us know your achievable date. Step2 and 3 would be depends on the completion of step1. Excited to meet your excellent work!