a,b,c=input() a,b,c,d=int(a),int(b),int(c) if a>b>c and b>c: print({a}+{b}+{c}) elif a>b>c : print({a}+{c}+{d}) elif b>a>c : print({b}+{a}+{c}) elif b>c>a :. print({b}+{c}+{a}) elif c>b>a : print({c}+{b}+{a}) else: print({c}+{a}+{b})