# フォーマットチェック

import re
import sys

content = input()
pattern = r'^(\d+)$'
result = re.match(pattern, content)

if not result:
    sys.exit("format error.")

Q = int(content)

if not (1 <= Q and Q <= 2024):
    sys.exit("Q")

for _ in range(Q):
    content = input()
    pattern = r'^(\d+)$'
    result = re.match(pattern, content)

    if not result:
        sys.exit("format error.")

    N = int(content)

    if not (1 <= N):
        sys.exit("N")

    ws = []

    for __ in range(N - 1):
        content = input()
        pattern = r'^(\d+) (\d+) (\d+)$'
        result = re.match(pattern, content)

        if not result:
            sys.exit("format error.")

        u, v, w = map(int, content.split())

        if not (1 <= u and u < v and v <= N):
            sys.exit("u, v")

        ws.append(w)
    
    # 木であるかはチェックしていない

    content = input()
    pattern = r'^(\d+) (\d+)$'
    result = re.match(pattern, content)

    if not result:
        sys.exit("format error.")

    H, W = map(int, content.split())

    if not (1 <= H and H <= 12):
        sys.exit("H")

    if not (1 <= W and W <= 25):
        sys.exit("W")
    
    if not (N <= H * W):
        sys.exit("N")

    for i in range(N - 1):
        if not (ws[i] <= H * W):
            sys.exit("w")

    for __ in range(H):
        content = input()
        pattern = r'^(.|#){' + str(W) + '}$'
        result = re.match(pattern, content)

        if not result:
            sys.exit("format error.")
    
    # 塗り方が木的であるかはチェックしていない

print("OK")