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- $\=$/;
- my @a=(1,2,3,4,6,8,9);
- for my $a (@a) {
- for my $b (@a) {
- next if $b <= $a;
- for my $c (@a) {
- next if $c <= $b;
- for my $d (@a) {
- next if $d <= $c;
- next unless sqrt($a*$b*$c*$d+1) == int sqrt($a*$b*$c*$d+1);
- print $a, v9, $b, v9, $c, v9, $d, v9, v9, int sqrt($a*$b*$c*$d+1);
- }
- }
- }
- }
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