RXXJ
      +---------
QYRFJ | GUCRRYFG
       -QYRFJ
        =====
        FUJCLY
       -FFYXJG
        ======
         FJLQRF
        -FFYXJG
         ======
          LLUUXG
         -LRYQJL
          ======
           UXTJL

base: 11
letters: CFGJLQRTUXY
difficulty: intermediate
restrictions: no multiplication