0
double-penetration
23K
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2K
0
4K
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
