#getopts example: 
    x=1         # Avoids an error if we get no options at all.
    while getopts "abcf:g:h:" opt; do
      case "$opt" in
        a) echo "You said a";;
        b) echo "You said b";;
        c) echo "You said c";;
        f) echo "You said f, with argument $OPTARG";;
        g) echo "You said g, with argument $OPTARG";;
        h) echo "You said h, with argument $OPTARG";;
      esac
      x=$OPTIND
    done
    shift $((x-1))
    echo "Left overs: $@"