????????
      +---------
CHXNX | PQXWEYEE
       -CHXNX
        =====
        UCXREY
       -URNUQX
        ======
         UCXWYE
        -URNUQX
         ======
          UCNCEE
         -URNUQX
          ======
          ??????

base: 11
letters: CEHNPQRUWXY
difficulty: medium
hints: H << Q