4
5
5-1
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
in
out
6
7
8
8-1
in
out
9
ok