ELHPA
    +---------
WHA | QUALMPAA
     -UHMA
      ====
       PQLM
      -EXQA
       ====
        EWMP
       -EEHA
        ====
         QQPA
        -QQPA
         ====
            AA

base: 10
letters: AEHLMPQUWX
difficulty: medium