import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        String result = IntStream.range(0, n).mapToObj(a -> {
            long[] values = new long[3];
            for (int i = 0; i < 3; i++) {
                values[i] = sc.nextLong();
            }
            long k = sc.nextLong();
            while (k-- > 0 && !same(values)) {
                long[] next = new long[3];
                for (int i = 0; i < 3; i++) {
                    next[i] = (values[(i + 1) % 3] + values[(i + 2) % 3]) / 2;
                }
                values = next;
            }
            return String.valueOf(Arrays.stream(values).sum());
        }).collect(Collectors.joining("\n"));
        System.out.println(result);
    }
    
    static boolean same(long[] values) {
        return values[0] == values[1] && values[1] == values[2];
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}