inner surface of pine bark
brick
cardboard
cork
rubber eraser
felt
leather wallet
rigid plastic sheet
very fine sandpaper
nylon scouring pad
cellulose kitchen sponge
woven straw
block of styrofoam
unglazed ceramic tile
velvet
wax paper
glossy painted wood
0
22
23
24
26
27
26
23
24
23
23
18
23
21
28
24
22
0
27
27
27
29
29
28
16
18
28
25
24
10
29
28
27
0
18
19
28
23
24
24
29
27
28
21
26
28
24
23
0
15
28
25
26
28
28
20
27
10
26
28
28
29
0
28
20
27
24
27
24
25
19
24
29
24
28
0
24
28
29
26
26
29
28
29
4
28
29
0
22
28
28
27
26
25
29
24
21
20
0
27
29
29
27
25
25
29
12
13
0
21
24
26
25
12
29
29
27
0
22
16
25
24
27
29
28
0
19
21
26
27
29
27
0
26
26
28
27
25
0
25 0
29 29 0
26 28 27 0
29 26 26 12
0