??????
    --------
NXJ ) JLNPLM
     -LHY
      ===
      UHPP
     -UXUM
      ====
       UMUL
      -UXUM
       ====
        NTHM
       -UJNN
        ====
        ????

base: 11
symbols: EHJLMNPTUXY
difficulty: medium
missing: E