Fig.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
FIG. 2
Q Z
1
A B C
2
D E F
3
G H I
4
J K L
5
M N O
6
P R S
7
T U V
8
W X Y
9
*
0
#
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