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  1. or download this
    -l print,s!(.)\1*!$&%9/$1.$1!egfor(++$_)x10
    1234567890123456789012345678901234567890123
    
  2. or download this
    -l print,s!(.)\1*!$&%9/$1.$1!egfor(p^A)x10
    123456789012345678901234567890123456789012