from collections import *
from itertools import *
from functools import *
import sys,math
input = sys.stdin.readline

def answer():
    
    
    a,b,c,K = map(int,input().split())
    
    bef = sorted([a,b,c])
    
    for _ in range(K):
        a,b,c = (b+c)//2,(a+c)//2,(b+a)//2
        aft = sorted([a,b,c])
        if bef==aft:
            print(sum(aft))
            return
        bef = aft[:]
    print(sum(aft))
    return
    
for _ in range(int(input())):
    answer()