S=input()
l=[]
m=[]
for i in S:
	if ord(i)>ord("T") and i not in "CTP":
		l.append(i)
for i in S:
	if ord(i)<ord("T") and i not in "CTP":
		m.append(i)
l="".join(sorted(l))
m="".join(sorted(m))
print(m+"T"*(S.count("T"))+"C"*(S.count("C"))+"P"*(S.count("P"))+l)