?????????
      -----------
MLQHW ) NHHJPRYPT
       -MLQHW
        =====
        MMHRLR
       -MMXUXR
        ======
          WNXGY
         -JJTHQ
          =====
           VJZUP
          -RTPUV
           =====
            WPQTT
           -WPTMJ
            =====
            ?????

base: 16
symbols: GHJLMNPQRTUVWXYZ
difficulty: medium