1
SANITATION
2
CLEAN
3
WATER
4
HYGIENE
5
DISINFECTION
6
FILTRATION
7
CHLORINATION
8
PURIFICATION
D
Z
U
O
O
J
Q
H
R
N
H
H
P
Z
I
R
Z
U
L
T
K
O
C
A
O
U
H
X
S
E
C
O
U
I
W
L
U
K
R
J
Y
V
I
G
E
T
U
W
E
F
U
I
S
P
G
I
N
A
Q
Q
Y
A
T
L
F
G
T
U
I
T
F
S
S
R
N
Y
I
I
P
S
V
I
E
O
E
A
O
Z
Y
H
C
U
H
N
N
Y
N
E
C
Y
A
M
V
A
E
A
B
X
P
U
E
A
T
K
V
X
T
S
A
Q
U
E
Y
R
J
X
I
C
O
I
C
H
L
O
R
I
N
A
T
I
O
N
O
E
O
O
O
P
W
A
T
E
R
F
N
N
F
I
L
T
R
A
T
I
O
N
O
A
E