QGEH
      +---------
UGMPU | HXUQNGGH
       -UGMPU
        =====
        QPGQGG
       - MJHPJ
        ======
         QNMHEG
        -QNPJQH
         ======
           JNNQH
          -EHXPN
           =====
           QHQPJ

base: 11
letters: EGHJMNPQUXY
difficulty: intermediate
missing: Y