insert  56  56  a
debug
makenull
insert  8195  8195  a
insert  8190  8190  b
debug
makenull

insert  128  384  a
insert  128  640  b
insert  6144  2048  c
search  512  512  500
debug
makenull

debug
search  512  512  500
remove  128  384
debug
insert  128  128  a
insert  128  128  b
search  128  128  128
debug
makenull

insert  6  8  a
insert  7  8  b
debug
insert  8  8  c
debug
remove  8  8
insert  8  8  d
search  8  8  0
search  7  8  1
search  7  8  10
search  8  7  1
insert  16380 16380 f
search  16384  16384  10
search  -1  -1  25
debug
remove  6  8
debug
remove  7  8
debug
remove  8  8
debug
makenull

insert  1024  1024  a
insert  8192  8192  c
debug
search  8192  8192  10
remove  8192  8192
makenull

debug
insert  16383  16383  b
insert  0  16383  c
insert  16383  0  d
debug
insert  12288  4096  a
search  4096  4096  1024
search  4096  4096  8192
search  4096  4096  8191
insert  0  0  e
search  4096  4096  8192
search  4096  4096  8191
debug
makenull

insert  -1  256  a
insert  256  -1  b
insert  256  16384  c
insert  16384  256  d
debug
insert  8  8  a
search  8  8  -1
search  -1  -1  1
search  16384  16384  10
search  -16384  -16384  10