HQT
      +---------
LQRGH | LRXQGXRH
       -LWGRWE
        ======
         XLTGTR
        -XXGHXR
         ======
          EXGHWH
         -EETHNG
          ======
           TLHXE

base: 10
letters: EGHLNQRTWX
difficulty: intermediate
restrictions: no multiplication