how to sort random numbers according to the sample ?

Dear R-users,

  ####  below is my code to randomized x three times.

  > x=c(6,8,9,11)
plan=NULL
for(i in 1:3){

+ set.seed(i)
+ r<-runif(x)
+ plan=cbind(plan,r)
+ }



  #####  which gave the matrix

  > plan

             r                  r         r
[1,] 0.2655087 0.1848823 0.1680415
[2,] 0.3721239 0.7023740 0.8075164
[3,] 0.5728534 0.5733263 0.3849424
[4,] 0.9082078 0.1680519 0.3277343

  #### and order numbers

 apply(plan,2,order)

       r r r
[1,] 1 4 1
[2,] 2 1 4
[3,] 3 3 3
[4,] 4 2 2

  ### My question is, is there a way to order the matrix "plan"   
according to x so I don't have to check that 1 is corresponding to   
6, 2 corresponds to 8 , 3 to 9 and 4 to 11. I mean after ordering   
matrix "plan " the result should be

       r   r     r
[1,] 6   11   6
[2,] 8   6   11
[3,] 9   9     9
[4,] 11 8     8

  Thanks for any help,

  All the bests,
  Jenny


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