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use warnings; use strict; ... { "\$A" => \undef, "\$B" => \0, "\$C" => \3, "\$i" => \1 } { "\$A" => \undef, "\$B" => \0, "\$C" => \3, "\$i" => \2 } { "\$A" => \undef, "\$B" => \0, "\$C" => \3, "\$i" => \3 }