Q1 Strings from RES There are eight strings of length 4 which cannot be produced by the following regular expression over the alphabet Σ = {a,b}. What are they? (a + ha) * (ab 1 ha)(b + ab)*

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter7: User-defined Simple Data Types, Namespaces, And The String Type
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Q1 Strings from RES
There are eight strings of length 4 which cannot be produced by the following regular expression
over the alphabet Σ = {a,b}. What are they?
(a+ba)* (ab+ba)(b + ab)*
Transcribed Image Text:Q1 Strings from RES There are eight strings of length 4 which cannot be produced by the following regular expression over the alphabet Σ = {a,b}. What are they? (a+ba)* (ab+ba)(b + ab)*
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