#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char*mmap();
#define RD(v) v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}

char wbuf[1<<28];
int w,h,z;

getd(){
	int t=z>9?9:z;
	z-=t;
	return t;
}

main(){
	char*rp=mmap(0l,1l<<28,1,2,0,0ll);
	RD(w);
	RD(h);
	RD(z);

	int s=w%3==2?2:1;
	int t=h%3==2?2:1;
	if(z>s*t*9){
		write(1,"-1\n",3);
		_exit(0);
	}

	char*wp=wbuf;
	for(int y=0;y<h;++y){
		for(int x=0;x<w;++x){
			*wp=y>=3?wp[(w+1)*-3]:x>=3?wp[-3]:
			48|(y==2||y==h%3||x==2||x==w%3?0:getd());
			wp++;
		}
		*wp++=10;
	}
	write(1,wbuf,(w+1)*h);
}