Q=int(input())
for _ in range(Q):
  N,M=map(int,input().split())
  G=[[] for i in range(N)]
  for i in range(M):
    a,b,c=map(int,input().split())
    G[a-1].append((b-1,c))
    G[b-1].append((a-1,c))
  dist=[-1]*N
  dist[0]=0
  dp=[0]*N
  from collections import deque
  S=deque()
  S.append(0)
  while S:
    x=S.popleft()
    for B in G[x]:
      y,c=B[:]
      if dist[y]==-1:
        dist[y]=dist[x]+1
        dp[y]=dp[x]^(c-1)
        S.append(y)
  if dist[N-1]==-1:
    print('Unknown')
  else:
    if dp[N-1]==0:
      print('Same')
    else:
      print('Different')
    print(dist[N-1])