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  1. or download this
    >perl -MEncode -e"print encode 'UTF-8', qq{use utf8; my \$x='a\xE1axBy
    +'; \$x =~ /(.*?)x(A*)y/; }" | perl
    Malformed UTF-8 character (unexpected continuation byte 0xa1, with no 
    +preceding start byte) in pattern match (m//) at - line 1.
    
  2. or download this
    61 C3 A1 61 78 42 79
    
  3. or download this
    (?!)\x{2660}|
    
  4. or download this
    use utf8;
    use open ':std', ':locale';
    
  5. or download this
    use utf8;
    use open ':std', ':encoding(cp852)';