from collections import Counter

x = list(input().strip())

c = Counter(x)

if len(c.keys()) == 1:
    print(-1)
elif c['0'] == len(x) - 1:
    print(-1)
else:
    v = sorted(c.keys())[0]
    c[v] -= 1

    e = sorted(c.keys(), reverse=True)
    for i in range(len(e)):
        t = str(e[i])
        if i != len(e) - 2:
            print(t * c[t], end='')
        else:
            print(t * (c[t] - 1), end='')
            print(v, end='')
            print(t, end='')
    print()