n | ntn tn t n | nttt | n tn t n | nttt | n tn t n | nt nt | ntn tn t n | nttt | n tn t n | nttt | n tn t n | nt nt | ntn tn t n | nttt | n tn t n | nttt | n tn t n | nt nt | ntn tn t n | nttt | n tn t n | nttt | n tn t n | nt nt | ntn tn t n | nttt | n tn t n | nttt | n tn t n | ntttnttnttn n n t | n nt ntt![](https://img.alicdn.com/imgextra/i2/134438702/T2CMfsXCXXXXXXXXXX-134438702.gif) | nt n n |