#include<bits/stdc++.h>
using namespace std;
int p,q;
int main()
{
	scanf("%d %d",&p,&q);
	if(4*p>3*q && (p!=4 || q!=5)){printf("-1 -1\n");return 0;}
	if(3*p<=2*q)
	{
		printf("1 %d\n",2*q);
		for(int i=1;i<=p;i++)printf("##.");
		for(int i=3*p+1;i<=2*q;i++)printf(".");
		printf("\n");
		return 0;
	}
	if(p==5 && q==7)
	{
		printf("7 6\n");
		printf("##..##\n");
		printf(".####.\n");
		printf("######\n");
		printf("#....#\n");
		printf("######\n");
		printf(".####.\n");
		printf("##..##\n");
		return 0;
	}
	if(p==7 && q==10)
	{
		printf("4 5\n");
		printf(".###.\n");
		printf("##.##\n");
		printf("##.##\n");
		printf(".###.\n");
		return 0;
	}
	if(p==3 && q==4)
	{
		printf("4 4\n");
		printf("..##\n");
		printf("####\n");
		printf("##..\n");
		printf("####\n");
		return 0;
	}
	if(p==4 && q==5)
	{
		printf("5 5\n");
		printf("#.###\n");
		printf("###.#\n");
		printf(".####\n");
		printf("##.##\n");
		printf("####.\n");
		return 0;
	}
	if(p==7 && q==9)
	{
		printf("18 6\n");
		printf("..####\n");
		printf("###.##\n");
		printf("#####.\n");
		printf("#..###\n");
		printf("####.#\n");
		printf(".#####\n");
		printf("##..##\n");
		printf("#####.\n");
		printf("#.####\n");
		printf("###..#\n");
		printf(".#####\n");
		printf("##.###\n");
		printf("####..\n");
		printf("#.####\n");
		printf("###.##\n");
		printf(".####.\n");
		printf("##.###\n");
		printf("####.#\n");
		return 0;
	}
	return 0;
}