QJQC
      +---------
MCYGR | CTRPGGJR
       -MCYGR
        =====
        QYJMCG
       -QCJTCT
        ======
          GGNJJ
         -MCYGR
          =====
          PQQPQR
         -PNMRPP
          ======
            TQTY

base: 10
letters: CGJMNPQRTY
difficulty: easy
restrictions: no multiplication