import sys
input = sys.stdin.readline

N,K=list(map(int,input().split()))
x,y=list(map(int,input().split()))
z,w=list(map(int,input().split()))

x-=1
y-=1
z-=1
w-=1

if x>z:
    x,z=z,x
    y,w=w,y

A=[["."]*N for i in range(N)]

MIN=abs(x-z)+abs(y-w)
MAX=MIN*2

if (x+y)%2!=(z+w)%2:
    MAX-=1
    

if MIN<=K<=MAX and (MIN%2==K%2):
    for i in range(N):
        for j in range(N):
            if (i,j)==(x,y) or (i,j)==(z,w):
                continue
            if (i+j)%2!=(x+y)%2:
                A[i][j]="#"

    now=MAX
    for i in range(x,z):
        if now!=K:
            
            if A[i][y]==A[i+1][y]:
                pass
            else:
                A[i+1][y]=A[i][y]
                now-=2

    if w>=y:
        for i in range(y,w):
            if now!=K:
                if A[z][i]==A[z][i+1]:
                    pass
                else:
                    A[z][i+1]=A[z][i]
                    now-=2
    else:
        for i in range(y,w,-1):
            if now!=K:
                if A[z][i]==A[z][i-1]:
                    pass
                else:
                    A[z][i-1]=A[z][i]
                    now-=2

    for ans in A:
        print("".join(ans))
        
                
                
                
    

else:
    print(-1)