enter command (? for help): l badFile.txt
unable to load
enter command (? for help): a H1
===[ H1 ]===
enter command (? for help): a
invalid command
enter command (? for help): f aa
not found
enter command (? for help): f
invalid command
enter command (? for help): b H2
===[ H2 ]===
     H1
enter command (? for help): b
invalid command
enter command (? for help): u H3
===[ H3 ]===
     H1
enter command (? for help): u
invalid command
enter command (? for help): j 1
===[ H1 ]===
     H3
enter command (? for help): j -1
===[ H3 ]===
     H1
enter command (? for help): j 0
===[ H3 ]===
     H1
enter command (? for help): j 10
===[ H3 ]===
     H1
enter command (? for help): j -10
===[ H3 ]===
     H1
enter command (? for help): j none
invalid command
enter command (? for help): q
quit