#!/bin/awk -f

BEGIN {
srand
phrases=", like,\
, y'know,\
, or whatever,\
, umm,\
, for sure,"

len=split (phrases, phrase, /\n/)
}


{ 
  split ( $0, parts, /,/)
  for (i=1; i<length(parts); i++) {
    printf "%s", parts[i]
    ind = 1+int(rand * 1000)%len;
    printf "%s", phrase[ind]
  }
print parts[i]
 # print $0
}