#!./perl
print "1..18\n";
sub foo1 {
    $_ = shift(@_);
    $a = 0;
    until ($a++) {
        next if $_ eq 1;
        next if $_ eq 2;
        next if $_ eq 3;
        next if $_ eq 4;
        return 20;
    }
    continue {
        return $_;
    }
}
print foo1(0) == 20 ? "ok 1\n" : "not ok 1\n";
print foo1(1) == 1 ? "ok 2\n" : "not ok 2\n";
print foo1(2) == 2 ? "ok 3\n" : "not ok 3\n";
print foo1(3) == 3 ? "ok 4\n" : "not ok 4\n";
print foo1(4) == 4 ? "ok 5\n" : "not ok 5\n";
print foo1(5) == 20 ? "ok 6\n" : "not ok 6\n";
sub foo2 {
    $_ = shift(@_);
    {
        last if $_ == 1;
        last if $_ == 2;
        last if $_ == 3;
        last if $_ == 4;
    }
    continue {
        return 20;
    }
    return $_;
}
print foo2(0) == 20 ? "ok 7\n" : "not ok 7\n";
print foo2(1) == 1 ? "ok 8\n" : "not ok 8\n";
print foo2(2) == 2 ? "ok 9\n" : "not ok 9\n";
print foo2(3) == 3 ? "ok 10\n" : "not ok 10\n";
print foo2(4) == 4 ? "ok 11\n" : "not ok 11\n";
print foo2(5) == 20 ? "ok 12\n" : "not ok 12\n";
sub foo3 {
    $_ = shift(@_);
    if (/^1/) {
        return 1;
    }
    elsif (/^2/) {
        return 2;
    }
    elsif (/^3/) {
        return 3;
    }
    elsif (/^4/) {
        return 4;
    }
    else {
        return 20;
    }
    return 40;
}
print foo3(0) == 20 ? "ok 13\n" : "not ok 13\n";
print foo3(1) == 1 ? "ok 14\n" : "not ok 14\n";
print foo3(2) == 2 ? "ok 15\n" : "not ok 15\n";
print foo3(3) == 3 ? "ok 16\n" : "not ok 16\n";
print foo3(4) == 4 ? "ok 17\n" : "not ok 17\n";
print foo3(5) == 20 ? "ok 18\n" : "not ok 18\n";