s ss\sgi;sgi;y ygsyajy if m msgi;m ;y ji;jphj;print

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Making all weird regexp-delimiters to /, you get:
s//sgi;/sgi; /y/gs/aj/ if m/sgi;; y/i;/ph/; print

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Adding some additional clarification, you get:
$_ =~ s//sgi;/sgi;    # $_ is now 'sgi;'
if($_ =~ /sgi;/){
  $_ =~ tr/gs/aj;  # 'jai;'
}
tr/i;/ph/;         # 'japh'
print $_;          # Voila!

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In reply to Random keyboard input. Almost. by phubuh

Title:
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