#include<stdio.h>
#include<math.h>
#include <stdlib.h>

int main()
{
    int n=0;
    int k=0;
    int sr,sc,tr,tc;
    int diff;
    
    scanf("%d %d",&n,&k);
    scanf("%d %d",&sr,&sc);
    scanf("%d %d",&tr,&tc);

    int len = abs(tr-sr)+abs(sc-tc);
     diff = k - len;
    if((len % 2) != (k % 2)){
      printf("-1");
    }else if((len*2 < k) || (len > k)){
      printf("-1");
    }else{
      for(int i=1;i<n+1;i++){
        for(int i2=1;i2<n+1;i2++){
          if((i<sr && i<tr) || (i>sr && i>tr) || (i<sc && i<tc) || (i>sc && i>tc)){
             if(((i+i2)%2 != (sr+sc)%2)){
              printf("#");
            }else{
              printf(".");
            }
           
          }else{
            if(((i+i2)%2 != (sr+sc)%2) && !(tr==i && tc==i2) && (abs(i+i2-sr-sc)<diff)){
              printf("#");
            }else{
              printf(".");
            }
          }
        }
        printf("\n");
      }
    }
    
    return 0;
}