Generating a (random) sequence of multiple characters in R

1. 
   

   I can create a sequence of single letters using

   
   

   
   LETTERS[seq( from = 1, to = 10 )]
   letters[seq( from = 1, to = 10 )]
   
   



2. 
   

   I can create a random string of various length, using the random package

   
   

   
   library(random)
   string <- randomStrings(n=10, len=5, digits=TRUE, upperalpha=TRUE,
                     loweralpha=TRUE, unique=TRUE, check=TRUE)
   
   

Unfortunately, I cannot use the set.seed function for example 2.

Is there a way to create the same (random) combination of (unique) strings everytime one runs a R-file?

My result would look like this (with the same result everytime I run the function):

       V1     
  [1,] "k7QET"
  [2,] "CLlWm"
  [3,] "yPuwh"
  [4,] "JJqEX"
  [5,] "38soF"
  [6,] "xkozk"
  [7,] "uaiOW"
  [8,] "tZcrW"
  [9,] "8K4Cc"
 [10,] "RAhuU"