Question: (Spt) Build a regular expression that captures all non-empty sequences of letters other than for. For your convenience, you may use a not operator that

(Spt) Build a regular expression that captures all non-empty sequences of letters other than "for". For your convenience, you may use a "not" operator that takes a set of letters as argument and matches any other letter. For instance, not(abc) matches any letter other than a, b and c. Useto match any letter

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