Answers

2015-06-29T18:14:50+08:00
0+15, 1+14, 2+13, 3+12, 4+11, 5+10, 6+9, 7+8, 8+7, 9+6, 10+5, 11+4, 12+3, 13+2, 14+1 and 15+0
That is 15 occurences.
0