You have number *a*, whose decimal representation quite luckily contains digits 1, 6, 8, 9. Rearrange the digits in its decimal representation so that the resulting number will be divisible by 7.

Number *a* doesn't contain any leading zeroes and contains digits 1, 6, 8, 9 (it also can contain another digits). The resulting number also mustn't contain any leading zeroes.
The first line contains positive integer *a* in the decimal record. It is guaranteed that the record of number *a* contains digits: 1, 6, 8, 9. Number *a* doesn't contain any leading zeroes. The decimal representation of number *a* contains at least 4 and at most 10<sup class="upper-index">6</sup> characters.
# Made By Mostafa_Khaled 
bot = True 
a=input()

cnt=[0]*10

for i in (1,6,8,9):

	cnt[i]=-1

for i in a:

	cnt[int(i)]+=1

mod = [1869, 1968, 9816, 6198, 1698, 1986, 1896, 1869]

modCnt=0

for i in range(1,10):

	for j in range(cnt[i]):

		modCnt= (modCnt*3 + i)%7

	print(str(i)*cnt[i], end='')

modCnt=(10000*modCnt)%7

print(str(mod[7-modCnt])+'0'*cnt[0])

# Made By Mostafa_Khaled