**** constant-constant comparisons ****
1	0
1	0
0	1
**** vector-vector comparisons ****
0	1
1	0
1	0
0	1
0	1
0	0
**** vector-constant comparisons ****
0	1
0	1
0	0
1	0
1	0
1	0
****
0	1
0	1
0	1
0	1
0	1
1	0
**** single-column sort ****
a	a
a\0\0	a\0
a\0\0\0\0	a\0\0\0
aa	aa\0
aa\0a	aa\0b
abcde\0	abcde
**** multi-column sort ****
a	a
a\0\0	a\0
a\0\0\0\0	a\0\0\0
aa	aa\0
aa\0a	aa\0b
abcde\0	abcde