#first > .one{font-size:2em;}
#first > .one > #second .two > #deux{width:50%;}
#first > .one > #second .two > #deux #third{height:100%;}
#first > .one > #second .two > #deux #third:focus{color:black;}
#first > .one > #second .two > #deux #third:focus #fifth > #sixth .seventh #eighth{color:purple;}
#first > .one > #second .two > #deux #fourth, #first > .one > #second .two > #deux #five, #first > .one > #second .two > #deux #six{color:#110000;}
#first > .one > #second .two > #deux #fourth .seven,
#first > .one > #second .two > #deux #five .seven,
#first > .one > #second .two > #deux #six .seven,
#first > .one > #second .two > #deux #fourth .eight > #nine,
#first > .one > #second .two > #deux #five .eight > #nine,
#first > .one > #second .two > #deux #six .eight > #nine{border:1px solid black;}
#first > .one > #second .two > #deux #fourth #ten, #first > .one > #second .two > #deux #five #ten, #first > .one > #second .two > #deux #six #ten{color:red;}