# pearl pearl pearl:Misc:300ptsChallenge instance ready at 95.216.233.106:49960.  pearlpearlpearlpearlpearlpearlpearlpearlpearlpearlpearlpearlpearlpearlpearl  
# Solutionncすると以下のように表示される。  何もできそうにないが、とりあえずファイルにはき出す。  ```bash$ nc 95.216.233.106 49960ctf{pearlpearlpearl}ctf{pearlpearlpearl}ctf{pearlpearlpearl}ctf{pearlpearlpearl}ctf{pearlpearlpearl}~~~$ nc 95.216.233.106 49960 > pearlpearlpearl.txt^C$ cat pearlpearlpearl.txtctf{pearlpearlpearl}ctf{pearlpearlpearl}ctf{pearlpearlpearl}ctf{pearlpearlpearl}ctf{pearlpearlpearl}~~~```odで見ると、改行が混在しているようだ。  ```bash$ od -An -c pearlpearlpearl.txt   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \r   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \n   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \n   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \n   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \r   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \r   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \n   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \r   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \r   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \n   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \n   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }  \r   c   t   f   {   p   e   a   r   l   p   e   a   r   l   p   e   a   r   l   }~~~```抽出してバイナリにしてみる(0と1を逆にしたものも試す必要がある)。  ```bash$ cat pearlpearlpearl.txt | tr -d "ractf{pearl} " | tr "\r" "0" | tr "\n" "1"0111001001100001011000110111010001100110011110110111000000110011001101000111001000110001010111110011000101101110011100110011000101100100001100110101111100110100010111110110001101101100001101000110110101111101```これを[バイナリからASCIIに変換](https://www.rapidtables.com/convert/number/binary-to-ascii.html)するとflagが得られる。 ractf{p34r1_1ns1d3_4_cl4m}
## ractf{p34r1_1ns1d3_4_cl4m}