Addition: 50, 19, 21, 66, 84, 29, and 54.
21
50
19, 50
19, 21, 50
19, 21, 50
21, 66
19
29, 50
21, 66
84
19
50
19
21
84
19
50
21
50, 66, 84
19
50, 66
50
21, 66
19
29, 50, 54
21, 50, 66
84
19
29
54
21
66
84
19
29
54
84
Deletion: 50, 66, and 54.
50
29
21
19
66
29
54
21
84
66
19
54
29, 66
19, 21
54
29
66
84
19, 21
29, 54
84
19, 21
21, 54
19
29
54
19
84
19, 21
21, 54
84
19
29
21, 29
84
29, 66
84
21
84
19
29, 84
54
84