s="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>       [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9]</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  [1,] "d"  ""   ""   ""   ""   ""   ""   ""   ""  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  [2,] "r"  "r"  "d"  ""   "r"  "r"  "d"  ""   ""  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  [3,] ""   ""   "d"  ""   "u"  ""   "d"  ""   ""  </span>
<span class="r-out co"><span c