.rtop,.rbottom{display:inline;}
.rtop *,.rbottom *{display:block; height: 1px; overflow: hidden}
.r1{margin: 0 5px} 
.r2{margin: 0 3px}
.r3{margin: 0 2px}
.r4{margin: 0 1px; height: 2px}

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