# coding: utf-8
# Your code here!

X=input()
num=[0]*10
for i in range(len(X)):
    num[9-int(X[i])]=num[9-int(X[i])]+1

mi=-1
mi2=-1
for i in range(10):
    if not num[9-i]==0:
        if mi==-1:
            mi=9-i
        else:
            mi2=9-i
            break
if mi2==-1 or sum(num)<num[9]+2:
    print(-1)
else:
    l=[]
    for i in range(10):
        if i==mi2:
            for j in range(num[i]-1):
                l.append(9-i)
            l.append(9-mi)
        elif i==mi:
            l.append(9-mi2)
            for j in range(num[i]-1):
                l.append(9-i)
        else:
            for j in range(num[i]):
                l.append(9-i)
    print(''.join(map(str,l)))