S = input()
lower =""
upper =""
digit =""
even = []
odd = []
for i in S:
    if i.islower():
        lower = lower + i
    elif i.isupper():
        upper += i
    else:
        if int(i)%2==0:
            even.append(i)
        else:
            odd.append(i)

digit = sorted(odd) + sorted(even)       
lower = sorted(lower)
upper = sorted(upper)

reveresed_str = lower + upper + digit 
print(''.join(reveresed_str))