.ls {width:6em;}
.rs {width:6em;}



.seq{}
.seq .num td{width:2em;}
.seq .diff td{width:2em; text-align:center;}
.seq .num td.h{width:6em; font-style:italic;}
.seq .diff td.h{width:6.9em; font-style:italic; text-align:left;}
.seq .arr{padding-left:7em;}
.seq .arr img{margin-left:0.3em;}