4
\E
4 T U V X PO PP
PQ
P

Q R
4
4 T U V X PO PP
PQ
P
Q R
4
4 T U V X PO PP
PQ
P

Q R
4 4 T U V X PO PP PQ P
Q R
9 10 11 12 1

2 3
9 10 11 12 1
2 3