count=1
val=$2
op=$1
ans=0
if [ $op = "-e" -o $op = "-o" ]
then
        if [ $op = "-e" ]
        then
                while [ $count -le $val ]
                do
                        ans=`expr $count % 2`
                        if [ $ans -eq 0 ]
                        then
                        echo "$count \c "
                        count=`expr $count + 1`
                        fi
                done
        elif [ $op = "-o" ]
        then
                while [ $count -le $val ]
                do
                        ans=`expr $count % 2`
                        if [ $ans -ne 0 ]   
                        then
                        echo "$count \c "
                        count=`expr $count + 1`
                        fi
                done
        fi
else
        while [ $count -le $val ]
        do
                echo "$count \c "
                count=`expr $count + 1`
        done
fi