s = input()
a = [0]*10
for i in map(int,s):
    a[i] += 1
v = sum(a)
if v in a or a[0]==v-1:
    print(-1)
else:
    ans = []
    for i in range(10):
        ans += [i]*a[i]
    for i in range(10):
        if a[i]: break
    v = a[i]
    ans[v],ans[v-1] = ans[v-1],ans[v]
    print("".join(map(str,ans[::-1])))