sub induced {
my (@z)=@_;
for my $QT (\@z ){
    #print Dumper $QT;
    for my $triplet ( @trip ){
        my %Pie;
        undef @Pie{@$QT};
        delete @Pie{ @$triplet };
        print "@$triplet\n" if keys(%Pie) <= ( @$QT - @$triplet ) ;
        return (@$triplet);
    }
}}

##</code><code>##

for my $QT (\@z ){
        ...
        undef @Pie{@$QT};
        ...
        print "@$triplet\n" if keys(%Pie) <= ( @$QT - @$triplet ) ;
        ...
}

##</code><code>##

    for my $triplet ( @trip ){
        my %Pie;
        undef @Pie{@$QT};
        delete @Pie{ @$triplet };
        print "@$triplet\n" if keys(%Pie) <= ( @$QT - @$triplet ) ;
        return (@$triplet);
    }

##</code><code>##

sub induced {

    my (@z) = @_;

    my $triplet = $trip[0];

    my %Pie;
    undef @Pie{ @z };
    delete @Pie{ @$triplet };
    print "@$triplet\n" if keys(%Pie) <= (@z - @$triplet);
    
    return @$triplet;
    
    }