No Prefix Set

  • + 1 comment

    Task is broken, don't waste your time on solving this one.

    Why? i.e. for test

    dcjaichjejgheiaie
    d
    dbeedfdjaghbhgdhcedcj
    

    you must return d, not dcjaichjejgheiaie even dcjaichjejgheiaie is in first place. test case #1