n,k=map(int,input().split())
if n>9*18:
  print(k)
  exit()
  
k+=1
dp=[[[0]*10 for _ in range(n+1)]]
dp[0][0][0]=1
  
while True:
  now=[[0]*10 for _ in range(n+1)]
  p=0
  for i in range(n+1):
    s=sum(dp[-1][i])
    for j in range(10):
      if i+j<=n:
        now[i+j][j]+=s
        p+=s
  dp.append(now)
  if p>=k:
    break
  
ans=[]
ma=n
while dp:
  now=dp.pop()
  for i in range(10):
    p=0
    for j in range(ma+1):
      p+=now[j][i]
    if k>p:
      k-=p
    else:
      ma-=i
      ans.append(str(i))
      break
    
ans.pop()
print(''.join(ans))