.rtop{display:block;}
.rbottom{display:block;}
.rtop *,.rbottom *{display:block;height: 1px;overflow: hidden}

.rt0{margin: 0 7px; border-bottom: 2px solid black;}
.rt1{margin: 0 6px; border-left: 2px solid black; border-right: 2px solid black;}
.rt2{margin: 0 3px; border-left: 2px solid black; border-right: 2px solid black;}
.rt3{margin: 0 2px; border-left: 2px solid black; border-right: 2px solid black;}
.rt4{margin: 0 1px; height: 2px; border-left: 2px solid black; border-right: 2px solid black;}

.rb0{margin: 0 7px; border-top: 2px solid black;}
.rb1{margin: 0 6px; border-left: 2px solid black; border-right: 2px solid black;}
.rb2{margin: 0 3px; border-left: 2px solid black; border-right: 2px solid black;}
.rb3{margin: 0 2px; border-left: 2px solid black; border-right: 2px solid black;}
.rb4{margin: 0 1px; height: 2px; border-left: 2px solid black; border-right: 2px solid black;}

.rs1{margin: 0 2px}
.rs2{margin: 0 1px}