#ifndef NC
#	define NC
#endif

#ifdef NC
#	ifdef N0
#		undef N0
#	else
#		define N0
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N1
#		undef N1
#	else
#		define N1
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N2
#		undef N2
#	else
#		define N2
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N3
#		undef N3
#	else
#		define N3
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N4
#		undef N4
#	else
#		define N4
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N5
#		undef N5
#	else
#		define N5
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N6
#		undef N6
#	else
#		define N6
#		undef NC
#	endif
#endif

#ifdef NC
#	ifdef N7
#		undef N7
#	else
#		define N7
#		undef NC
#	endif
#endif
