job[0] = "com1 | com 2" 
job[1] = "com3"
  .
  .
  .
 job[n] = "com100"

##</code><code>##

job[0] = "com1 > tmp.out" 
job[1] = "cat tmp.out >com2"
job[3] = "com3"
  .
  .
  .
 job[n+1] = "com100"