echo
----
+-------+------------+------------+--------------------+-----------------------------------+
| SPAN  |  KEY HEX   | ENDKEY HEX |    VERSION HEX     |              PRETTY               |
+-------+------------+------------+--------------------+-----------------------------------+
| {c-d} | 63         | 64         | 000000000000000109 | {c-d}/0.000000001,0               |
| {c-d} | 63         |            | 0000000000000001   | "c"/0.000000001,0                 |
| {c-d} | 63ffffffff |            | 0000000000000001   | "c\xff\xff\xff\xff"/0.000000001,0 |
+-------+------------+------------+--------------------+-----------------------------------+
