== <= >= "" ""
!= <= <  "" "a"
!= >= >  "b" ""
== <= >= "c" "c"
!= <= <  "d" "e"
!= >= >  "g" "f"
== <= >= "hijkl" "hijkl"
!= <= <  "mnopq" "mnopr"
!= >= >  "stuvx" "stuvw"
== <= >= "123" "123"
!= <= <  "123" "1234"
!= >= >  "1234" "123"
!= <= <  "aaaaaaaaaaaaaaaaaaaa" "bbbbbbbbbbbbbbbbbbbb"
== <= >= "c" "c"
== <= >= "bdbdbdbdbdbdbdbdbdhhg" "bdbdbdbdbdbdbdbdbdhhg"
!= <= <  "zzzzzzzzzzzzzzzzzx" "zzzzzzzzzzzzzzzzzy"