$ echo "id: xxx(6667)xxx"|awk -F "[()]" '{print }'
$ 6667
$ echo "abc[defg]higk" | awk -F "[][]" '{print }'
$ defg
$ echo "id: xxx(6667)xxx"|awk -F "[()]" '{pr$ echo "id: xxx(6667)xxx"|awk -F "[()]" '{print }'
$ 6667
$ echo "abc[defg]higk" | awk -F "[][]" '{print }'
$ defg
$ echo "id: xxx(6667)xxx"|awk -F "[()]" '{pr