Period of first differences by Christina Camacho

;"1
1
1
4
2
16
4
19
19
8
13
7
18
14
3
12
12
3
11
15
11
2
4
7
17
14
3
13
13
4
5
17
18
15
18
9
20
1
4
11
16
15
11
11
6
1
14
5
5
10
19
1
12
14
12
9
11
2
14
1
15
6
9
14
17
10
6
8
12
3
9
9
18
19
18
17
18
15
14
11
10
14
8
7
5
3
1
18
19
5
4
2
17
11
14
13
11
11
11
19
13
2
5
19
7
12
11
15
12
7
2
3
11"#

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