N = map(int, list(raw_input()))

l, r = -1, -1
fl = False
for i in xrange(len(N)):
    if not fl and N[i] == max(N[i:]):
        continue
    else:
        fl = True
    if fl:
        if l != -1 and N[i] == max(N[l+1:]):
            r = i
        if l == -1 and N[i] != max(N):
            l = i

#print l, r

ans = []
if l < r:
    for i in xrange(l):
        ans.append(N[i])
    ans.append(N[r])
    for i in xrange(l+1,r):
        ans.append(N[i])
    ans.append(N[l])
    for i in xrange(r+1, len(N)):
        ans.append(N[i])
else:
    ans = N

ans = map(str, ans)
print ''.join(ans)