Q=int(input())
for _ in range(Q):
  S,T=input().split()
  N=len(S)
  M=len(T)
  result=0
  u=[[0]*2 for i in range(N+1)]
  w=''
  for i in range(N):
    u2=[[0]*2 for i in range(N+1)]
    for j in range(1,N):
      for x in range(10):  
        if j>=M:
          u2[j+1][0]+=u[j][0]  
        else:
          y=int(T[j])  
          if x<y:
            u2[j+1][0]+=u[j][0]+u[j][1]
          elif x==y:
            u2[j+1][0]+=u[j][0]  
            u2[j+1][1]+=u[j][1]
          else:
            u2[j+1][0]+=u[j][0]
    y=int(S[i])
    if i>0:
      for x in range(1,10):
        if x<int(T[0]):
          u2[1][0]+=1
        elif x==int(T[0]):
          u2[1][1]+=1
      for x in range(y):
        s=w+str(x)
        if i>=M:  
          t=T
        else:
          t=T[:i+1]
        if s==t:
          u2[i+1][1]+=1  
        else:
          L=[s,t]
          L.sort()
          if s==L[0]:
            u2[i+1][0]+=1
    else:
      for x in range(1,y):
        if x<int(T[0]):
          u2[1][0]+=1
        elif x==int(T[0]):
          u2[1][1]+=1
    w+=S[i]
    u=u2.copy()
  for i in range(1,N+1):
    result+=u[i][0]+u[i][1]
  L=[S,T]
  L.sort()
  if S==L[0]:
    result+=1
  print(result)