import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigInteger;
public class Main {
public static void main(String[] args) throws java.lang.Exception {
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
for (int i = 0; i < 10; i++) {
String line = bf.readLine();
String secondLine = bf.readLine();
BigInteger apples = new BigInteger(line);
BigInteger klaudiaMoreApples = new BigInteger(secondLine);
System.out.println(apples.add(klaudiaMoreApples).divide(BigInteger.valueOf(2)));
System.out.println(apples.subtract(klaudiaMoreApples).divide(BigInteger.valueOf(2)));
}
}
}
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}