LLU
      +--------
FQUJJ | FNMHQMH
       -FQUJJ
        =====
         QEGHM
        -FQUJJ
         =====
         HWLGQH
        -HTXTNM
         ======
          LQTQT

base: 13
letters: EFGHJLMNQTUWX
difficulty: medium