| Answer | Crossword Clue |
|---|---|
| ESSES | Problem letters for Sylvester |
| LISP | Problem for Sylvester the Cat |
| ESSES | Troublesome letters for Sylvester |
| ESSES | Problem letters for lispers |
| cryptarithm | an arithmetic problem in which letters have been substituted for numbers and which is solved by finding all possible pairings of digits with letters that produce a numerically correct answer |
| cryptarithms | CRYPTARITHM, an arithmetic problem in which letters have been substituted for numbers and which is solved by finding all possible pairings of digits with letters that produce a numerically correct answer |
