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26.6.1.Regular Expressions: /a/
26.6.2.Match: [aA]
26.6.3.Match: AAA|BBB
26.6.4.Match: [A-Z][0-9]
26.6.5.Matching a single literal character(It can be either a lower or upper case character)
26.6.6.Matching sequences of more than one literal character (The format is two upper case letters, a dash and three numbers)
26.6.7.Regular Expression Tester Form
26.6.8.To match words bread, read, or red
26.6.9.To match 'b{0,1}rea{0,1}d'