while(1):
    try:
        s=input()
        k=[]
        for i in s:
            if i.isalpha():
                k.append(i)
        t=sorted(k,key=lambda x:x.lower())
        index=0
        for i in s:
            if i.isalpha():
                print(t[index],end='')
                index+=1
            else:
                print(i,end='')



    except:
        break