N=[int(i) for i in input()]
for (i,x) in enumerate(N):
    #print(i,x)
    flag=False
    max_n=x

    for (j,y) in enumerate(N[i+1:]):
        #print(i,j,y)
        if y>max_n or (flag and y >= max_n):
            max_n=y
            min_j=j
            flag=True

    if flag:
        N[i],N[i+1+min_j]=N[i+1+min_j],N[i]
        break

print("".join([str(i) for i in N]))