T=int(input())
M=998244353
for _ in range(T):
  n=int(input())
  e=[[] for i in range(n)]
  for i in range(n-1):
    u,v=map(int,input().split())
    u-=1
    v-=1
    e[u]+=[v]
    e[v]+=[u]
  v=[0]*n
  u=[[0]*4 for i in range(n)]
  q=[0]
  while len(q)>0:
    s=q[-1]
    if v[s]==0:
      v[s]=1
      for t in e[s]:
        if v[t]==1:
          e[s].remove(t)
      q+=e[s]
    else:
      u[s][0]=1
      for t in e[s]:
        for i in range(3):
          u[s][i+1]+=u[t][i]
      v[s]=0
      q.pop()
  c=0
  for s in range(n):
    c+=u[s][3]
    w=u[s][2]
    c+=sum(w-u[t][1] for t in e[s])
    c%=M
  print(c)