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+-- Perl Weekly Challenge 194
+-- Task 1
+
+CREATE SCHEMA IF NOT EXISTS pwc194;
+
+CREATE OR REPLACE FUNCTION
+pwc194.task1_plperl( text )
+RETURNS int
+AS $CODE$
+ my ($what) = @_;
+
+ if ( $what =~ / ^ ([\d?]) ([\d?]) : ([\d?]) ([\d?]) $ /x ) {
+    if ( $1 eq '?' ) {
+       return 9;
+    }
+    elsif ( $2 eq '?' ) {
+      return 3 if $1 == 2;
+      return 9;
+    }
+    elsif ( $3 eq '?' ) {
+      return 5;
+    }
+    else {
+      return 9;
+    }
+ }
+
+return undef;
+
+$CODE$
+LANGUAGE plperl;