Who knew ?: the single-letter wildcard operator

You already know that the asterisk (*) acts as a multi-letter wildcard operator, meaning it will look for multiple substitute letters.  You can use it to expand a root “word” such as “testa.” If you search for testa*, your results may include words like testamentary, testator, testable, etc. If you need just need to substitute one letter, use the question mark (?) as a single-letter wildcard operator. Not sure whether the game Pokémon is spelled with an "o" or an "a"? Try Pokem?n.  You may be surprised at the variations that come up!

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