NRQ
      +--------
UJMJR | LNRHNTN
       -JWPHM
        =====
         XLZGT
        -XXQXP
         =====
          MTLGN
         -MYNYV
          =====
           NGTT

base: 16
letters: GHJLMNPQRTUVWXYZ
difficulty: hard
hints: U greater than 0, J << T, G << N