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 '#'.
n=int(input())
l=[]
for i in range(n):
	l.append(list(input()))
f=0
for j in range(n-2):
	for k in range(n):
		if(l[j][k]=='#'):
			if(l[j+1][k]=='#'):
				if(-1<(k-1)<n):
					if(l[j+1][k-1]=='#'):
						if(-1<(k+1)<n):
							if(l[j+1][k+1]=='#'):
								if(l[j+2][k]=='#'):
									l[j][k]='.'						
									l[j+1][k]='.'
									l[j+1][k-1]='.'
									l[j+1][k+1]='.'
									l[j+2][k]='.'
								else:
									f=1
									break
							else:
								f=1
								break
						else:
							f=1
							break
					else:
						f=1
						break
				else:
					f=1
					break
			else:
				f=1
				break
if(f==0):
	print('YES')
else:
	print('NO')