ginortS

# Enter your code here. Read input from STDIN. Print output to STDOUT
inp = input()
 
lower = list()
upper = list()
digis = list()
for i in inp:
    if i.islower():
        lower.append(i)
    elif i.isupper():
        upper.append(i)
    else:
        digis.append(i)
 
lower.sort()
upper.sort()
odd = list()
even = list()
for j in digis:
    if int(j)%2 == 0:
        even.append(j)
    else:
        odd.append(j)
 
even.sort()
odd.sort()
print(''.join(lower)+''.join(upper)+''.join(odd)+''.join(even))