TRAFFICCONGESTION
OUTSOURCINGJOBS
OVERPOPULATION
NEWTECHNOLOGY
GLOBALWARMING
TUITIONFEES
SHORTAGE
OBESITY
VIRUS
O
X
G
T
U
I
T
I
O
N
F
E
E
S
A
O
C
O
K
B
N
J
O
Y
D
K
E
L
N
A
L
A
J
A
U
R
M
U
E
M
Q
I
G
C
L
X
U
O
M
K
E
M
O
T
H
M
O
S
C
E
A
O
Q
J
S
E
I
G
D
U
V
E
S
W
P
Q
I
E
S
D
L
Q
E
Y
G
T
B
H
E
W
E
O
P
R
B
T
B
A
E
O
V
F
E
L
S
E
N
N
E
E
U
P
U
H
Y
H
C
E
N
O
I
Z
O
E
G
U
J
X
C
R
U
X
O
K
A
E
P
H
N
P
C
B
G
P
E
J
A
B
C
A
X
H
A
G
O
A
C
N
P
U
A
N
Z
T
B
O
V
I
U
W
I
A
T
S
X
E
D
D
U
L
O
E
M
Y
S
S
N
C
V
J
J
U
V
S
T
E
E
O
W
C
U
H
R
M
V
G
Y
O
C
E
F
S
M
W
M
I
I
A
C
I
M
Q
X
D
J
T
S
A
G
H
G
G
E
Z
W
O
R
I
D
G
U
L
I
O
U
A
I
A
A
Q
E
N
H
N
F
M
F
A
I
B
I
L
B
M
O
M
T
A
P
E
U
D
U
Y
I
F
V
I
R
U
S
S
X
G
U
R
F
I
F
S
L
A
E
N
A
Z
M
Z
E
I
F
A
I
W
O
N
W
D
O
Y
K
V
G
R
I
S
L
C
O
V
V
U
U
H
I
U
U
A
E
Q
U
A
T
Q
E
Q
J
V
H
Y
C
B
S
C
O
V
E
R
P
O
P
U
L
A
T
I
O
N
P
Y
I
