X = input()
x = [0] * 10
for i in range(len(X)):
    x[int(X[i])] += 1
first_min = 10
second_min = 10
for i in range(10):
    if x[0] == len(X) - 1:
        print(-1)
        exit()
    if x[i] == len(X):
        print(-1)
        exit()
    if x[i] > 0 and first_min == 10 and second_min == 10:
        first_min = i
        continue
    if x[i] > 0 and first_min != 10 and second_min == 10:
        second_min = i
ans = ''
for i in range(9, -1, -1):
    if i != first_min and i != second_min:
        ans += str(i) * x[i]
    if i == second_min:
        ans += str(i) * (x[i]-1) + str(first_min)
    if i == first_min:
        ans += str(second_min) + str(i) * (x[i]-1)
print(ans)