
# slower version:

s = input()
for i in range(len(s)):
  if i%2 == 0:
    print(s[i], end = '')


# optimized version of the same code:

s = input()
ans = ''
for i in range(len(s)):
  if i % 2 == 0:
    ans += s[i]
print(ans)



# slower version:

dX = [2,2,2,1,0,-1,-2,-2,-2,-1,0,1]

dY = [-1,0,1,2,2,2,1,0,-1,-2,-2,-2]

def solve(x,y,XY):

	xy = XY[:]

	if len(xy) == 0: return "OK"

	sx,sy = xy.pop(0),xy.pop(0)

	for dx,dy in zip(dX,dY):

		if doa(x+dx,y+dy,sx,sy): 

			r = solve(x+dx,y+dy,xy)

			if r: return r



def doa(x,y,sx,sy):

	if not (0 <= x <= 9 and 0 <= y <= 9): return False

	return True if abs(x-sx) < 2 and abs(y-sy) < 2 else False



while 1:

	x,y = list(map(int,input().split()))

	if x == y == 0: break

	n = eval(input())

	xy = list(map(int,input().split()))

	ans = solve(x,y,xy)

	print(ans if ans else "NA")

# optimized version of the same code:

dX = [2,2,2,1,0,-1,-2,-2,-2,-1,0,1]

dY = [-1,0,1,2,2,2,1,0,-1,-2,-2,-2]

def solve(x,y,XY):

	xy = XY[:]

	if len(xy) == 0: return True

	sx,sy = xy.pop(0),xy.pop(0)

	for dx,dy in zip(dX,dY):

		if doa(x+dx,y+dy,sx,sy): 

			r = solve(x+dx,y+dy,xy)

			if r: return r



def doa(x,y,sx,sy):

	if not (0 <= x <= 9 and 0 <= y <= 9): return False

	return True if abs(x-sx) < 2 and abs(y-sy) < 2 else False



while 1:

	x,y = list(map(int,input().split()))

	if x == y == 0: break

	n = eval(input())

	xy = list(map(int,input().split()))

	print("OK" if solve(x,y,xy) else "NA")
dX = [2, 2, 2, 1, 0, -1, -2, -2, -2, -1, 0, 1]
dY = [-1, 0, 1, 2, 2, 2, 1, 0, -1, -2, -2, -2]


def solve(x, y, XY):
    xy = XY[:]
    if len(xy) == 0:
        return "OK"
    sx, sy = xy.pop(0), xy.pop(0)
    for dx, dy in zip(dX, dY):
        if doa(x + dx, y + dy, sx, sy):
            r = solve(x + dx, y + dy, xy)
            if r:
                return r


def doa(x, y, sx, sy):
    if not (0 <= x <= 9 and 0 <= y <= 9):
        return False
    return True if abs(x - sx) < 2 and abs(y - sy) < 2 else False


while 1:
    x, y = list(map(int, input().split()))
    if x == y == 0:
        break
    n = eval(input())
    xy = list(map(int, input().split()))
    ans = solve(x, y, xy)
    print(ans if ans else "NA")

dX = [2, 2, 2, 1, 0, -1, -2, -2, -2, -1, 0, 1]
dY = [-1, 0, 1, 2, 2, 2, 1, 0, -1, -2, -2, -2]


def solve(x, y, XY):
    xy = XY[:]
    if len(xy) == 0:
        return True
    sx, sy = xy.pop(0), xy.pop(0)
    for dx, dy in zip(dX, dY):
        if doa(x + dx, y + dy, sx, sy):
            r = solve(x + dx, y + dy, xy)
            if r:
                return r


def doa(x, y, sx, sy):
    if not (0 <= x <= 9 and 0 <= y <= 9):
        return False
    return True if abs(x - sx) < 2 and abs(y - sy) < 2 else False


while 1:
    x, y = list(map(int, input().split()))
    if x == y == 0:
        break
    n = eval(input())
    xy = list(map(int, input().split()))
    print("OK" if solve(x, y, xy) else "NA")

-        return "OK" +        return True -    ans = solve(x, y, xy) -    print(ans if ans else "NA") +    print("OK" if solve(x, y, xy) else "NA")