system(cls);
my $loop=1;
@one=(NMS,Hydrogen,Helium,Lithium,Beryllium,Boron,Carbon,Nitrogen,Oxygen,Fluorine,Neon,Sodium,Magnesium,Aluminium,Silicon,Phosphorus,Sulfur,Chlorine,Argon,Potassium,Calcium,Scandium,Titanium,Vanadium,Chromium,Manganese,Iron,Cobalt,Nickel,Copper,Zinc);
@two=(SYM,H,He,Li,Be,B,C,N,O,F,Ne,Na,Mg,Al,Si,P,S,Cl,Ar,K,Ca,Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn);

my $ans;
while ($loop==1)
{
$rand=int(rand(30))+1;
$rand2=int(rand(3))+1;
$rand3=int(rand(2))+1;

if ($rand2==1) {
	print "Atomic Number: $rand\n";

	if ($rand3==1) {
		print "Give Me Element Name\n";
		chomp($ans=<>);
	if ($ans eq "/hint") {print "@two[$rand]\n";print "Give Me Element Name\n";
		chomp($ans=<>);}
	if ($ans eq @one[$rand]) {print "correct\n"} else {print "Incorrect:  Correct answer is ". @one[$rand]."\n";}


}

if ($rand3==2) {
print "Give Me Element Symbol\n";
chomp($ans=<>);

if ($ans eq "/hint") {print "@one[$rand]\n";print "Give Me Element Symbol\n";
chomp($ans=<>);}

if ($ans eq @two[$rand]) {print "correct\n"} else {print "Incorrect:  Correct answer is ". @two[$rand]."\n";}
}
}

if ($rand2==2) {
print "Element Name: @one[$rand]\n";


if ($rand3==1) {
print "Give Me Element Number\n";
chomp($ans=<>);

if ($ans eq "/hint") {print "@two[$rand]\n";print "Give Me Element Number\n";
chomp($ans=<>);}

if ($ans eq $rand) {print "correct\n"} else {print "Incorrect:  Correct answer is $rand\n"}
}

if ($rand3==2) {
print "Give Me Element Symbol\n";
chomp($ans=<>);

if ($ans eq "/hint") {print "$rand\n";print "Give Me Element Symbol\n";
chomp($ans=<>);}


if ($ans eq @two[$rand]) {print "correct\n"} else {print "Incorrect:  Correct answer is ". @two[$rand]."\n";}
}
}

if ($rand2==3) {
print "Element Symbol: @two[$rand]\n";
if ($rand3==1) {
print "Give Me Element Number\n";
chomp($ans=<>);

if ($ans eq "/hint") {print "@one[$rand]\n";print "Give Me Element Number\n";
chomp($ans=<>);}

if ($ans eq $rand) {print "correct\n"} else {print "Incorrect:  Correct answer is $rand\n"}
}

if ($rand3==2) {
print "Give Me Element Name\n";
chomp($ans=<>);

if ($ans eq "/hint") {print "$rand\n";print "Give Me Element Name\n";
chomp($ans=<>);}

if ($ans eq @one[$rand]) {print "correct\n"} else {print "Incorrect:  Correct answer is ". @one[$rand]."\n";}
}
}
}