Creating multiple SSH connections at a time using Paramiko

The code below runs grep in one machine through SSH and prints the results:

import sys, os, string
import paramiko

cmd = "grep -h 'king' /opt/data/horror_20100810*"

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('10.10.3.10', username='xy', password='xy')
stdin, stdout, stderr = ssh.exec_command(cmd)
stdin.write('xy\n')
stdin.flush()

print stdout.readlines()

How can I grep five machines all at once (so that I don't have major delay), than put all that in five variables and print them all out.