Aliens

19 February 2020, Unidentified flying object (UFO) has captured student’s attention on top of the CSE building of Sylhet Engineering College. The door of the UFO was closed. Students found a tiny LCD monitor on the door. It’s just displaying 2 strings on separate lines. Let’s call the strings p and q. Actually the passcode of the door is hidden in these two strings and length is minimal. The passcode is any string if and only if p and q are its subsequence. Example - let p = abcab & q = cba Accepted Passcodes of the door are -abcaba, abcbab, acbcab, cabcab.


This is a companion discussion topic for the original entry at https://toph.co/p/aliens