TYAP
      +---------
TYWUR | AAQEAWAA
       -RWRUP
        =====
         PAUWW
        -WEEET
         =====
         EYQHAA
        -EEPATU
         ======
          TEEYAA
         -EPQHYT
          ======
           TEWTY

base: 10
letters: AEHPQRTUWY
difficulty: intermediate
restrictions: no multiplication