Question: Given the following rules in lex, state whether there is any rule that cannot be matched and explain why, if there is any. letter [a-zA-Z]

Given the following rules in lex, state whether there is any

Given the following rules in lex, state whether there is any rule that cannot be matched and explain why, if there is any. letter [a-zA-Z] digit [0-9] {letter} ({letter}|{digit}) * {digit}+ "while" printf ("VARIABLE "); printf ("NUMBER "); printf("WHILE ")

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