| Title | Test
                    Find
                    
                    Doubled alphanumeric/alpha/numeric identification | 
            
                | Expression | \b([A-Za-z0-9]+) +\1\b | 
            
                | Description | Repeated word/character/number/number with alpha character can be identified with this RE | 
            
                | Matches | (123a 123a) (22 22) (ab ab) (ad12 ad12) | 
            
                | Non-Matches | (1 1two) (1 one) (twothree4 234) (24rg 24gr) (re45 re54) (k-k k-k) | 
            
                | Author | Rating:
                        
Not yet rated.
                    Mukundh | 
            
                | Source | own | 
            
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