GXXU
      +---------
HTYMY | YUGHGPGH
       -LJTLX
        =====
        HPLXYP
       -HYXUYT
        ======
         HQYEJG
        -HYXUYT
         ======
           MMLUH
          -PQJPP
           =====
           HHQJP

base: 13
letters: EGHJLMPQRTUXY
difficulty: medium
missing: R