def change(N):
    N_li = list(str(N))
    for i in range(len(N_li)):
        N_li[i] = int(N_li[i])
    n_max = max(N_li)
    for j in range(1, len(N_li) + 1):
        if N_li[-j] == n_max:
            N_li[-j] = 0 + N_li[0]
            N_li[0] = n_max
            break
    s = ''
    for k in range(len(N_li)):
        s += str(N_li[k])
    return int(s)

def main():
    N = int(input())
    print(change(N))

if __name__ == '__main__':
    main()