n = list(input()) 
n.sort() 
lower, upper, odd, even = '', '', '', ''
for i in n: 
    if i.islower(): 
        lower += i 
    elif i.isupper(): 
        upper += i 
    elif i.isdigit()  and int(i)%2 == 1: 
         odd += i 
    elif i.isdigit() and int(i)%2 == 0:
          even += i 
print(lower+upper+odd+even)