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+-- Perl Weekly Challenge 185
+-- Task 1
+
+CREATE SCHEMA IF NOT EXISTS pwc185;
+
+CREATE OR REPLACE FUNCTION
+pwc185.task1_plperl( text )
+RETURNS text
+AS $CODE$
+my ( $input ) = @_;
+
+$input =~ s/\./g/;
+
+my ( $counter, $output ) = ( 1, '' );
+for ( split( //, $input ) ) {
+    $output .= $_;
+    $output .= ':' if $counter % 2 == 0;
+    $counter++;
+}
+
+return $output;
+$CODE$
+LANGUAGE plperl;