Hi all,
Good day to you.

Given the table below, I want to extract all entries in Column 1 that
appeared more than once in the table. These entries should be extracted with
their respective other entries in the other columns. The result should be
saved to a file.

Please, assist me in writing a Perl script that would be able to do this?

I'll appreciate every assistance towards achieving this.

Best regards,
Ken


Column 1        Column 2        Column 3        Column 4        
A       234     2AS     ASD     
B       567     RF5     RFT     
C       367     789     THB     
D       231     R5TG    YHJ     
E               HU8     UJM     
R       798     23WS    IKL     
D       099     34RT    UJHG    
C       678     56U0    WSD     
J       43      OOPL0   RFGB    
A       567     23ED    GHN     
V       32      SDC3    DCXZ    
B       12      123W    ERDS    
B       456     SD45    RFG     
E       780     FGB68   GHN     
E       654     WERT4   HJM     
G       234     SCX1    JKL     
X       567     6YH2    OLP     
A       34      45RF    TYU     
B       234     234DCV  RFE     
E       678     WSA12   SAWE    
F       908     3ED5    RFDE    
C       342     RFT67   TGF     
C       15      7U89    HNG     
C       897     FDGB    YUJ     
D       590     6YJI    TRF     
A       402     9OLIP   6YH     
B       304     923ED   YHJ     
B       674     DCF567  UJK     
A       135     789OIL  LOI     

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