"Source: Text/Code/CodeFld.text";
"Line: 1638";
"Date: Thu Sep 25 14:47:47 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Code/CodeFld.text, line: 1638
// Example: H165E17 ()
print "Example: H165E17";
ei := GetEchoInput();
SetEchoInput(true);
C := ExtendCode( QRCode(GF(2),23) );
C:Minimal;
IsSelfDual(C);
assert $1;
D := Dual(C);
D: Minimal;
C eq D;
assert $1;
SetEchoInput(ei);
