var a array;

a[1] := "hello";
a[4] := "world";

print( a[1]);
print( a[4]);

a[4] := "hey";
print( a[1]);
print( a[4]);

var b;

b := a;

print( "b created, initialized");
print( a[1]);
print( a[4]);
print( b[1]);
print( b[4]);

a[1] := "changed a";

print( "a modified");
print( a[1]);
print( a[4]);
print( b[1]);
print( b[4]);