NNMQ
      ----------
NQMUQ ) LUMMNPTN
       -QULMN
        =====
        HPHPPP
       - QULMN
        ======
         NQHPLT
        -NUHTHU
         ======
          HMTQHN
         -HQQQNH
          ======
           HLMMH

base: 8
symbols: HLMNPQTU
difficulty: intermediate
restrictions: no multiplication