15
16
21
21
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16
16
17
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18
21
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15
16
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21
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15
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21
21
21
21
16
20
16
15
20
17
21
21
20
20
21
14
16
17
21
20
21
18
21
12
16
15
21
15
21
20
16
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21
21
21
21
21
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18
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16
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16
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12
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12
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15
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21
21
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21
16
21
21
15
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21
21
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14