DB<107> my @cmd; { local $"=','; @cmds = < "{@commands} - {@dbs}" > }
 => (
  "HPRMCLI exch create -s EXCHDAGNODE1 - db1",
  "HPRMCLI exch create -s EXCHDAGNODE1 - db2",
  "HPRMCLI exch mount  -h RMEBackupSvr - db1",
  "HPRMCLI exch mount  -h RMEBackupSvr - db2",
  "HPRMCLI exch validate -level Log - db1",
...