PMFP
       +----------
WFAPHW | AMNFMFPNF
        -WFAPHW
         ======
         EWWAMWP
        -EWNHPMW
         =======
            HNAMNF
           -WFAPHW
            ======
            NNFNNW

base: 8
letters: AEFHMNPW
difficulty: easy
restrictions: no multiplication