#include<stdio.h>
int min(int a,int b){if(a<b){return a;}return b;}

int main(){
  int h,w,x;
  scanf("%d%d%d",&w,&h,&x);
  int fl=0;
  if(h%3==0){fl|=3;}
  if(h%3==1){fl|=12;}
  if(w%3==0){fl|=5;}
  if(w%3==1){fl|=10;}
  int a=0,b=0,c=0,d=0;
  if((fl&1)==0){a=min(9,x);x-=a;}
  if((fl&2)==0){b=min(9,x);x-=b;}
  if((fl&4)==0){c=min(9,x);x-=c;}
  if((fl&8)==0){d=min(9,x);x-=d;}
  if(x>0){puts("-1");return 0;}
  for(int i=0;i<h;i++){
    for(int j=0;j<w;j++){
      if(i%3==0&&j%3==0){printf("%d",a);}
      else if(i%3==0&&j%3==1){printf("%d",b);}
      else if(i%3==1&&j%3==0){printf("%d",c);}
      else if(i%3==1&&j%3==1){printf("%d",d);}
      else{printf("0");}
    }puts("");
  }
  return 0;
}