a=[[*map(int,input())]for _ in range(8)]
q=[(a[0],0)]
while q:
  na,i=q.pop()
  if i==7:
    if na==[0]*8:
      exit(print('Yes'))
    continue
  i+=1
  for _ in range(8):
    nxt=[na[k]-a[i][k]for k in range(8)]
    q+=(nxt,i),
    na=na[1:]+[na[0]]
print('No')