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.
N=input()
cnt=[0,0,0,0,0,0,0,0,0,0]
for c in N:
    cnt[ord(c)-48]+=1
cnt[1]-=1
cnt[6]-=1
cnt[8]-=1
cnt[9]-=1
ans=[1869,1968,1689,6198,1698,1986,1896]
res=""
mod=0
for i in range(9,0,-1):
    for j in range(cnt[i]):
        res+=str(i)
        mod=(mod*3+i)%7
res+=str(ans[mod*3%7])
for i in range(cnt[0]):
    res+='0'
print(res)