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alphas = [9, 4, 3, 2, 22,  13, 7,  140, 95, 278]
betas  = [8, 3, 4, 1, 278, 94, 15, 7,   19, 200]
result = (alphas & betas).sort

alphas = [9, 4, 3, 2, 22,  13, 7,  140, 95, 278]
betas  = [8, 3, 4, 1, 278, 94, 15, 7,   19, 200]
...
        result.append(x)

result.sort()

result = filter(lambda y: y != 0, [x in betas and x for x in alphas])
result.sort()

@result = sort { $a <=> $b }
          map  { my $x = $_; grep $x == $_, @betas } @alphas;