题解 | #图片整理#

s=input()
a=[]
b=[]
c=[]
for i in s:
    if i.isalpha():
        if i.isupper():
            b.append(i)
        else:
            c.append(i)
    else:
        a.append(i)
a=sorted(a)
b=sorted(b)
c=sorted(c)
print(''.join(a+b+c))