# 2024年10月19日   下午18:35


# A Famous Saying: Much Ado About Nothing (2012/8).
# A aaAAbc dFgghh: iimM nNn oooos Sttuuuy (2012/8).

s = input()
a = ''
for i in s:
    if i.isalpha():
        a += i
#print(a)
b = sorted(a,key=str.upper)
#print(*b)
res = ''
idx = 0
for i in range(len(s)):
    if s[i].isalpha():
        res += b[idx]
        idx += 1
    else:
        res += s[i]
print(''.join(res))