????????
      +---------
UUMAR | AAPAJXRJ
       -UUMAR
        =====
        RXANXX
       -RNXAMN
        ======
         XUWRXR
        -XNWMXR
         ======
          RMUNNJ
         -RUAAPR
          ======
          ??????

base: 9
letters: AJMNPRUWX
difficulty: easy