debug on;
a1= 1.1;	// some leading/trailing blanks/tabs
a1=1.e-9;// shouldn't hurt
b0=	"abc"	;
b0=""; // empty string is ok
b0=a0;
b0=aa40;
b0=$B2;//comment
b0=b$2;
b0=$cc$33;	// comment

d9=fabs(avg(CC10:bb20)); // prev line is empty
b2=b3=b4=avg(b$9:$a0);
a0=fabs(a1);
a0=avg(a1:z10);
d0 = 1+e9/b4+8-fabs( d1);

copy a0:a0 b1:b1;
copy $a1:a$0 b$0:$b1; // fixed flag is ignored for copy

copy a1:b4 c1:d4;
copy b4:a1 c1:d4;
copy d1:a2 f4:c3;

copy b1:a4 d4:e8;  // range mismatches
copy e4:d8 f4:h8;

a1 = sqrt( d1);
a2 = avg( d1:d9);
a3 = count( d1:d9);
a4 = max( d1:d9);
a5 = min( d1:d9);
a6 = prod( d1:d9);
a7 = stdev( d1:d9);
a8 = sum( d1:d9);

copy d9:d1 a1:a9;
fill c1:c10 2, 3;