Fox Ciel has a board with *n* rows and *n* columns. So, the board consists of *n* × *n* cells. Each cell contains either a symbol '.', or a symbol '#'.

A cross on the board is a connected set of exactly five cells of the board that looks like a cross. The picture below shows how it looks.

Ciel wants to draw several (may be zero) crosses on the board. Each cross must cover exactly five cells with symbols '#', and any cell with symbol '#' must belong to some cross. No two crosses can share a cell.

Please, tell Ciel if she can draw the crosses in the described way.
The first line contains an integer *n* (3 ≤ *n* ≤ 100) — the size of the board.

Each of the next *n* lines describes one row of the board. The *i*-th line describes the *i*-th row of the board and consists of *n* characters. Each character is either a symbol '.', or a symbol '#'.
def pos_possivel(i, j, n):
    if i < 0 or j < 0:
        return False
    if i >= n or j >= n:
        return False
    return True

def posso_desenhar_cruz(board, n, i, j):
    board[i][j] = "."
    for k in range(-1, 2):
        if not pos_possivel(i+1, j+k, n): return False
        if board[i+1][j+k] == ".": return False
        board[i+1][j+k] = "."
    if not pos_possivel(i+2, j, n): return False
    if board[i+2][j] == ".": return False
    board[i+2][j] = "."
    return True
    

def solve(board, c_count, n):
    if c_count % 5 != 0: 
        return False
    for i in range(n):
        for j in range(n):
            if board[i][j] == "#":
                if not posso_desenhar_cruz(board, n, i, j):
                    return False
    
    return True

n = int(input())

board = []
c_count = 0

for i in range(n):
    line = []
    texto = [c for c in input()]
    for j in range(n):
        line.append(texto[j])
        if texto[j] == "#": c_count += 1
    board.append(line)

if solve(board, c_count, n):
    print("YES")
else:
    print("NO")
 	 		  	 		 	 		 		  	 				 			