#!/usr/local/bin/bash

ALPHNUM="QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm1234567890"
NOALPHNUM="@$%&*"

function help()
{
        echo help
}

if [ "$#" == "1" ] && [ "$1" == "-h" ]; then
        help
        exit
fi

STR="$ALPHNUM"$NOALPHNUM

LEN=${#STR}

OK="nieJeToOK"

while [ "$OK" != "OK" ];
do
        GEN=""
        A="0"
        B="0"

        for (( I=0 ; $I-8 ; I=$I+1 ))
        do
                OFFSET=$(($RANDOM % $LEN))
                C=${STR:$OFFSET:1}

                if [ "`echo $ALPHNUM | grep $C`" != "" ]; then
                        A=$(($A+1))
                fi

                if [ "`echo $NOALPHNUM | grep $C`" != "" ]; then
                        B=$(($B+1))
                fi

                GEN="$GEN"$C
        done

        if [ "$A" -ge "2" ] && [ "$B" -ge "2" ]; then
                OK="OK"
        fi
done

echo $GEN